OMAP3: igep00x0: add missing include mach-types.h

Current '#if' directives (used in igep00x0.h config file) comparing MACH_TYPE
values in igep00x0.h doesn't work as expected. The comparision between
CONFIG_MACH_TYPE and MACH_TYPE_IGEP0020 is always true independent of the IGEP
machine configured.

For example, following directive

 if (CONFIG_MACH_TYPE == MACH_TYPE_IGEP0020)
    define something
 endif

Is always evaluated true although we configure u-boot for MACH_TYPE_IGEP0030.

The build doesn't shows any error so looks that both defines had always the same
value. Including the mach-types.h file sets properly the value of
MACH_TYPE_IGEPxxxx.

Signed-off-by: Enric Balletbo i Serra <eballetbo@iseebcn.com>

include/configs/igep00x0.h

@@ -36,6 +36,7 @@
 
 #include <asm/arch/cpu.h>
 #include <asm/arch/omap3.h>
+#include <asm/mach-types.h>
 
 /*
  * Display CPU and Board information