os/include/tinyara/reboot_reason.h : Change board specific reboot reason from 250.
os/include/tinyara/reboot_reason.h : Change board specific reboot reason from 250.

For board specific reboot reason, change to start them from 250.

Signed-off-by: jeongchanKim <dd29dda359f9c9995ad03eb5d0e774929bcceb5c@samsung.com>

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