omap device tree changes that are needed to fix
regressions and avoid electrical issues on beaglebone black.

Via Benoit Cousson <bcousson@baylibre.com>:

Fix BBB LDO voltage to avoid HDMI destruction
Fix OMAP5 wrong attribute
Fix typo in beagle xM strings
Fix missing pinmux and regulator for OMAP4 wifi
Fix missing pinmux for igep headset
Merge tag 'for_3.12-rc2/dts_signed' of git://git.kernel.org/pub/scm/linux/kernel/git/bcousson/linux-omap-dt into omap-for-v3.12/fixes-dt

Fix BBB LDO voltage to avoid HDMI destruction
Fix OMAP5 wrong attribute
Fix typo in beagle xM strings
Fix missing pinmux and regulator for OMAP4 wifi
Fix missing pinmux for igep headset