Fix build error when PREEMPT_RT_FULL is enabled

Upstream-Status: Pending

Signed-off-by: Jacob Kroon <jacob.kroon@mikrodidakt.se>

Index: git/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_os.c
===================================================================
--- git.orig/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_os.c
+++ git/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_os.c
@@ -3266,7 +3266,7 @@ gckOS_CreateMutex(
     gcmkONERROR(gckOS_Allocate(Os, gcmSIZEOF(struct mutex), Mutex));
 
     /* Initialize the mutex. */
-    mutex_init(*Mutex);
+    mutex_init((struct mutex*)*Mutex);
 
     /* Return status. */
     gcmkFOOTER_ARG("*Mutex=0x%X", *Mutex);