gpu: host1x: Fix typo in comment

Signed-off-by: Thierry Reding <[e-mail]>

drivers/gpu/host1x/hw/cdma_hw.c

···
 #include "../debug.h"
 
 /*
- * Put the restart at the end of pushbuffer memor
+ * Put the restart at the end of pushbuffer memory
  */
 static void push_buffer_init(struct push_buffer *pb)
 {