m28evk: enable "env grep" and regexp support

Signed-off-by: Wolfgang Denk <wd@denx.de>

Conflicts:
	include/configs/m28evk.h

include/configs/m28evk.h

@@ -65,6 +65,7 @@
 #define CONFIG_CMD_EXT2
 #define CONFIG_CMD_FAT
 #define CONFIG_CMD_GPIO
+#define CONFIG_CMD_GREPENV
 #define CONFIG_CMD_I2C
 #define CONFIG_CMD_MII
 #define CONFIG_CMD_MMC
@@ -77,6 +78,8 @@
 #define CONFIG_CMD_SPI
 #define CONFIG_CMD_USB
 
+#define CONFIG_REGEX			/* Enable regular expression support */
+
 /*
  * Memory configurations
  */