arch: arm: rename omap4 panda defconfig

Renaming previous panda_omap4_defconfig to omap4panda_defconfig to
follow name used in board file.

Signed-off-by: Israel Cepeda <israel4c@gmail.com>
arch: arm: omap4: update hdmi for pandaboard

Fix some issues in hdmi gpios due to changes in hdmi panel driver, and
also reserve ram for fb.

Signed-off-by: Israel Cepeda <israel4c@gmail.com>
ASoC: omap: fix warning for hdmi

Fix warning when trying to enable omap5 dss when no omap5 was being
selected.

Signed-off-by: Israel Cepeda <israel4c@gmail.com>