drivers: renesas: rcar: common: Code cleanup

drivers: renesas: rcar: common: Code cleanup

This patch fixes the below checkpatch warnings
 Line 13: WARNING: please, no spaces at the start of a line
 Line 15: WARNING: please, no spaces at the start of a line
 Line 18: WARNING: Missing a blank line after declarations
 Line 24: WARNING: please, no spaces at the start of a line
 Line 26: WARNING: please, no spaces at the start of a line
 Line 29: WARNING: Missing a blank line after declarations

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Change-Id: I41d146e86889640d11e88c0717039353ddceff0d