zephyrproject-rtos#20119 Backport for SCR7/9 support

Zephyr release v.3.2.0 has no EARLY initialization level.
So the MPU and L1/L2 initialization is moved to PRE_KERNEL_1 level

Author: amr-sc

soc/riscv/riscv-privilege/scr7/soc.c

@@ -58,4 +58,4 @@ static int riscv64_scr7_init(const struct device *arg)
     return 0;
 }
 
-SYS_INIT(riscv64_scr7_init, EARLY, 0);
+SYS_INIT(riscv64_scr7_init, PRE_KERNEL_1, 0);

soc/riscv/riscv-privilege/scr9/soc.c

@@ -58,4 +58,4 @@ static int riscv64_scr9_init(const struct device *arg)
     return 0;
 }
 
-SYS_INIT(riscv64_scr9_init, EARLY, 0);
+SYS_INIT(riscv64_scr9_init, PRE_KERNEL_1, 0);