arch/arm/amebad_reboot_reason.c : Add debug msg in read, write and clear
arch/arm/amebad_reboot_reason.c : Add debug msg in read, write and clear

For debugging, add debug msg in read, write and clear reboot reason.

Signed-off-by: jeongchanKim <8412e4b7886bb8f7b20db6e68f9b32a40819eb8d@gmail.com>

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