helper/types: cast to uint32_t,uint16_t to avoid UB by shifting int too far

Without this, we have some types promoted to `int` when they need to be
`unsigned int`.

Here's some ubsan output hitting this:

Unfortunately, what happens is that things get promoted to `int`, but
need to be `unsigned int`. Here's the ubsan output:

src/helper/types.h:126:65: runtime error: left shift of 255 by 24 places cannot be represented in type 'int'
    #0 0x55978a612060 in le_to_h_u32 src/helper/types.h:126
    arduino#1 0x55978a61ff9e in stlink_usb_read_reg src/jtag/drivers/stlink_usb.c:1539
    arduino#2 0x55978a8cfd45 in adapter_load_core_reg_u32 src/target/hla_target.c:67
    arduino#3 0x55978a9f48e3 in armv7m_read_core_reg src/target/armv7m.c:236
    arduino#4 0x55978a8d24fc in adapter_load_context src/target/hla_target.c:372
    arduino#5 0x55978a8d261b in adapter_debug_entry src/target/hla_target.c:396
    arduino#6 0x55978a8d3123 in adapter_poll src/target/hla_target.c:457
    arduino#7 0x55978a528357 in target_poll src/target/target.c:535
    arduino#8 0x55978a539fd4 in target_wait_state src/target/target.c:2914
    arduino#9 0x55978a556e20 in jim_target_wait_state src/target/target.c:5256
    arduino#10 0x55978a5cca62 in command_unknown src/helper/command.c:1030
    arduino#11 0x55978aaed894 in JimInvokeCommand /home/cody/d/openocd-code/jimtcl/jim.c:10364

Change-Id: I24f6abfd26b6980100657397d69c84f2b80a005a
Signed-off-by: Cody P Schafer <[email protected]>
Reviewed-on: http://openocd.zylin.com/4455
Reviewed-by: Tomas Vanek <[email protected]>
Tested-by: jenkins
Reviewed-by: Christopher Head <[email protected]>

Author: Cody P Schafer

src/helper/types.h

@@ -128,17 +128,17 @@ static inline uint64_t le_to_h_u64(const uint8_t *buf)
 
 static inline uint32_t le_to_h_u32(const uint8_t* buf)
 {
-	return (uint32_t)(buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
+	return (uint32_t)((uint32_t)buf[0] | (uint32_t)buf[1] << 8 | (uint32_t)buf[2] << 16 | (uint32_t)buf[3] << 24);
 }
 
 static inline uint32_t le_to_h_u24(const uint8_t* buf)
 {
-	return (uint32_t)(buf[0] | buf[1] << 8 | buf[2] << 16);
+	return (uint32_t)((uint32_t)buf[0] | (uint32_t)buf[1] << 8 | (uint32_t)buf[2] << 16);
 }
 
 static inline uint16_t le_to_h_u16(const uint8_t* buf)
 {
-	return (uint16_t)(buf[0] | buf[1] << 8);
+	return (uint16_t)((uint16_t)buf[0] | (uint16_t)buf[1] << 8);
 }
 
 static inline uint64_t be_to_h_u64(const uint8_t *buf)
@@ -155,17 +155,17 @@ static inline uint64_t be_to_h_u64(const uint8_t *buf)
 
 static inline uint32_t be_to_h_u32(const uint8_t* buf)
 {
-	return (uint32_t)(buf[3] | buf[2] << 8 | buf[1] << 16 | buf[0] << 24);
+	return (uint32_t)((uint32_t)buf[3] | (uint32_t)buf[2] << 8 | (uint32_t)buf[1] << 16 | (uint32_t)buf[0] << 24);
 }
 
 static inline uint32_t be_to_h_u24(const uint8_t* buf)
 {
-	return (uint32_t)(buf[2] | buf[1] << 8 | buf[0] << 16);
+	return (uint32_t)((uint32_t)buf[2] | (uint32_t)buf[1] << 8 | (uint32_t)buf[0] << 16);
 }
 
 static inline uint16_t be_to_h_u16(const uint8_t* buf)
 {
-	return (uint16_t)(buf[1] | buf[0] << 8);
+	return (uint16_t)((uint16_t)buf[1] | (uint16_t)buf[0] << 8);
 }
 
 static inline void h_u64_to_le(uint8_t *buf, int64_t val)