Documentation: ARM: List new omap MMC requirements

Earlier the PBIAS regulator was optional, not so with recent
omap_hsmmc changes. To make things easier for people with
custom .config files, let's add minimal documentation for it
as suggested by Russell King <rmk+kernel@arm.linux.org.uk>.

Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/Documentation/arm/OMAP/README b/Documentation/arm/OMAP/README
new file mode 100644 (file)
index 0000000..75645c4
--- /dev/null
+++ b/Documentation/arm/OMAP/README
@@ -0,0 +1,7 @@
+This file contains documentation for running mainline
+kernel on omaps.
+
+KERNEL         NEW DEPENDENCIES
+v4.3+          Update is needed for custom .config files to make sure
+               CONFIG_REGULATOR_PBIAS is enabled for MMC1 to work
+               properly.