uboot-omap: add C4 revision in findfdt

fixes BeagleBoard C4 detection

error message in serial console was:
"WARNING: Could not determine device tree to use"

change is found in upstream u-boot

Signed-off-by: Dirk Neukirchen <[email protected]>

SVN-Revision: 43392

package/boot/uboot-omap/patches/003-fix_findfdt_C4.patch

@@ -0,0 +1,11 @@
+--- a/include/configs/omap3_beagle.h
++++ b/include/configs/omap3_beagle.h
+@@ -242,6 +242,8 @@
+ 			"setenv fdtfile omap3-beagle.dtb; fi; " \
+ 		"if test $beaglerev = Cx; then " \
+ 			"setenv fdtfile omap3-beagle.dtb; fi; " \
++		"if test $beaglerev = C4; then " \
++			"setenv fdtfile omap3-beagle.dtb; fi; " \
+ 		"if test $beaglerev = xMAB; then " \
+ 			"setenv fdtfile omap3-beagle-xm.dtb; fi; " \
+ 		"if test $beaglerev = xMC; then " \