[9610] wlbt: Fix compilation error in platform_mif.c

[9610] wlbt: Fix compilation error in platform_mif.c

drivers/misc/samsung/scsc/platform_mif.c: In function 'platform_mif_map_region':
drivers/misc/samsung/scsc/platform_mif.c:1501:2: error: implicit declaration of function 'kmalloc' [-Werror=implicit-function-declaration]
  pages = kmalloc((size >> PAGE_SHIFT) * sizeof(*pages), GFP_KERNEL);
  ^
drivers/misc/samsung/scsc/platform_mif.c:1501:8: warning: assignment makes pointer from integer without a cast
  pages = kmalloc((size >> PAGE_SHIFT) * sizeof(*pages), GFP_KERNEL);
        ^
drivers/misc/samsung/scsc/platform_mif.c:1513:2: error: implicit declaration of function 'kfree' [-Werror=implicit-function-declaration]
  kfree(pages);

Change-Id: I633d0e41aa929a510bdd510f928a2f9479239b11
SCSC-Bug-Id: SSB-40175
Signed-off-by: Tarun Karela <t.karela@samsung.com>