mtd: s3c2410 nand: Remove uncessary null check
mtd: s3c2410 nand: Remove uncessary null check

clk_get() return a pointer to the struct clk or an ERR_PTR().

Signed-off-by: Jonghwan Choi <a1b1c34da4eddaa3495f0b6a971517234e873a08@samsung.com>
Signed-off-by: Artem Bityutskiy <2f96f8cd3e2780a209d0ab27d1b44624d0019d3f@intel.com>

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