kdb: code cleanup to use macro instead of value
kdb: code cleanup to use macro instead of value

It's better to use macro KDB_BASE_CMD_MAX instead of 50

Signed-off-by: Jovi Zhang <089527d8f515d40198c7ff326e46f5e4940cf75c@gmail.com>
Signed-off-by: Jason Wessel <3f19c87103ac4cd0301ffd05a2421b687c7b3c77@windriver.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas