ARM: shmobile: lager: correct renesas,gpios to renesas,groups in sd[02] pfc

Fix probable typo of renesas,groups in the lager dt. The kernel has no
renesas,gpios but this should match renesas,groups.

Signed-off-by: Rob Taylor <rob.taylor@codethink.co.uk>
[ben.dooks@codethink.co.uk: fixup description]
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>