oprofile: rename variable ibs_allowed to has_ibs in op_model_amd.c
oprofile: rename variable ibs_allowed to has_ibs in op_model_amd.c

This patch renames ibs_allowed to has_ibs. Varible name fits better
now.

Signed-off-by: Robert Richter <22a70fd9773e4de05b12c05075e9bcd605577f4d@amd.com>

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