ARM: davinci: remove __init atrribute from function declaration

__init attribute does not make sense on function declarations.
Get rid of them in mach-davinci.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>