kgdb,x86: use macro HBP_NUM to replace magic number 4
kgdb,x86: use macro HBP_NUM to replace magic number 4

Use the macros provided by the HW breakpoint API.

Signed-off-by: Dongdong Deng <6d5d28619ab062193c3b684945e50928effedf86@windriver.com>
Signed-off-by: Jason Wessel <3f19c87103ac4cd0301ffd05a2421b687c7b3c77@windriver.com>

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