nuc900fb: don't treat NULL clk as an error
nuc900fb: don't treat NULL clk as an error

clk_get() returns a struct clk cookie to the driver and some platforms
may return NULL if they only support a single clock.  clk_get() has only
failed if it returns a ERR_PTR() encoded pointer.

Cc: 884c56c11fd64773fc86cd52a4ea5cbef674401a@vger.kernel.org
Signed-off-by: Jamie Iles <b4dde37aa2aac745c0e6c43447507eaeace3e59f@jamieiles.com>
Acked-by: Wan ZongShun <7d90017055ae88f9b614c1a99b7a29176cffa725@gmail.com>
Signed-off-by: Paul Mundt <38b52dbb5f0b63d149982b6c5de788ec93a89032@linux-sh.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas