[PATCH RESEND 6/6] clk: s5p-g2d: Fix incorrect usage of IS_ERR_OR_NULL

On Wed, Jan 02, 2013 at 08:10:36AM +0300, Dan Carpenter wrote:

clk_get() returns NULL if CONFIG_HAVE_CLK is disabled.

I told Tony about this but everyone has been gone with end of year
holidays so it hasn't been addressed.

Tony, please fix it so people don't apply these patches until
clk_get() is updated to not return NULL.  It sucks to have to revert
patches.

How about people stop using IS_ERR_OR_NULL for stuff which it shouldn't
be used for?