drm/vmwgfx: Fix build issues in mksGuestStats discovered by the kernel test robot

Fixes for ARCH
i386
	* printk format specifier warnings
	* inconsistent operand constraints in an ‘asm’ errors
arm64
	* not targeted by the commit being fixed

Reviewed-by: Zack Rusin <zackr@vmware.com>
Fixes: 7a7a933e ("drm/vmwgfx: Introduce VMware mks-guest-stats")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Martin Krastev <krastevm@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210615182336.995192-5-zackr@vmware.com


Signed-off-by: Zack Rusin <zackr@vmware.com>