staging: pvr: Makefile: enable -DSGX_FEATURE_SYSTEM_CACHE or we get

[  208.687203] PVR_K: (FAIL) SGXInit: Mismatch in client-side and KM driver build options.
[  208.695605] PVR_K: Extra options present in client-side driver: (0x2000). Please check sgx_options.h
[  208.705741] PVR_K:(Error): PVRSRVFinaliseSystem: Failed PVRSRVDevInitCompatCheck call (device index: 0)
[  208.820231] PVR_K:(Error): BridgedDispatchKM: Initialisation failed.  Driver unusable.

Signed-off-by: H. Nikolaus Schaller <[email protected]>

Author: goldelico

drivers/gpu/drm/pvrsgx/1.14.3699939/eurasia_km/Makefile

@@ -201,8 +201,8 @@ endif
 # special for omap5/6 according to eurasiacon/build/linux2/omap_linux/Makefile
 ifeq ($(SGX),sgx544)
 ccflags-y += -DSGX_FEATURE_MP
-ccflags-n += -DSGX_FEATURE_SYSTEM_CACHE
 ccflags-y += -DSGX_FEATURE_MP_CORE_COUNT=2
+ccflags-y += -DSGX_FEATURE_SYSTEM_CACHE	# assumed by client libs
 ccflags-n += -DSYS_OMAP_HAS_DVFS_FRAMEWORK	# sgxfreq extension
 # may be broken...
 ccflags-y += -DSUPPORT_ACTIVE_POWER_MANAGEMENT