const qualifier was misplaced in couple of definitions.
This fixes the sparse error:

  CHECK   arch/arm/mach-davinci/board-mityomapl138.c
arch/arm/mach-davinci/board-da850-evm.c:404:19: error: Just how const do you want this type to be?
arch/arm/mach-davinci/board-da850-evm.c:568:19: error: Just how const do you want this type to be?
Signed-off-by: NSekhar Nori <nsekhar@ti.com>