pcmcia: omap: Add missing check for platform_get_resource

[ Upstream commit ecef14f7 ]

Add missing check for platform_get_resource() and return error if it fails
to catch the error.

Fixes: d87d44f7 ("ARM: omap1: move CF chipselect setup to board file")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>