msm: kgsl: Correctly enable A3XX performance counters
msm: kgsl: Correctly enable A3XX performance counters

Remove code in a3xx_perfcounter_enable which erroneously
modifies A3XX_RBBM_PERFCTR_LOAD_CMD* registers. These registers
are not required to enable the performance counter.

Change-Id: I863db174a2ea6fc6e8496e4e95818e19c57f8645
Signed-off-by: Harshdeep Dhatt <695912e9a92fbf1491499dabcbfa8b6645fca07f@codeaurora.org>

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