OMAP3: igep00x0: Reduce lines of code for IGEP-based boards.

This is rework on config files of IGEP-based boards with the aim to remove
duplicated code to be more maintainable. Basically this patch creates a
common configuration file for both boards and only sets the specific option
in the board config file.

On board files the hardcored mach type was replaced in favour of using the
CONFIG_MACH_TYPE option.

More than 200 duplicated lines have been deleted.

Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com>
diff --git a/boards.cfg b/boards.cfg
index 4e94197..4d839d2 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -199,8 +199,8 @@
 omap3_overo                  arm         armv7       overo               -              omap3
 omap3_pandora                arm         armv7       pandora             -              omap3
 dig297                       arm         armv7       dig297              comelit        omap3
-igep0020                     arm         armv7       igep0020            isee           omap3
-igep0030                     arm         armv7       igep0030            isee           omap3
+igep0020                     arm         armv7       igep0020            isee           omap3		igep00x0:MACH_TYPE=MACH_TYPE_IGEP0020
+igep0030                     arm         armv7       igep0030            isee           omap3		igep00x0:MACH_TYPE=MACH_TYPE_IGEP0030
 am3517_evm                   arm         armv7       am3517evm           logicpd        omap3
 mt_ventoux                   arm         armv7       mt_ventoux          teejet         omap3
 omap3_zoom1                  arm         armv7       zoom1               logicpd        omap3