zephyr-3.7 migration: include microblaze_asm.h only in asm files

Otherwise, utterly generic macros I defined clash with other people's
utterly generic macros.

Signed-off-by: Alp Sayin <alpsayin@gmail.com>

Author: alpsayin

include/zephyr/arch/microblaze/arch.h

@@ -21,7 +21,6 @@
 
 #include <microblaze/emulate_isr.h>
 #include <microblaze/mb_interface.h>
-#include <microblaze/microblaze_asm.h>
 #include <microblaze/microblaze_regs.h>
 
 #define ARCH_STACK_PTR_ALIGN 16