imx6: move all standard includes to mx6_common.h

The linux/sizes.h, asm/arch/imx-regs.h, asm/imx-common/gpio.h,
config_cmd_default.h includes are used fairly universally across imx6 boards
so include them in mx6_common.h by default.

We define CONFIG_SYS_NO_FLASH before config_cmd_default.h  so that we
don't have to undef CONFIG_CMD_FLASH / CONFIG_CMD_IMLS everywhere.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
diff --git a/include/configs/cgtqmx6eval.h b/include/configs/cgtqmx6eval.h
index b189bf1..f8e5e57 100644
--- a/include/configs/cgtqmx6eval.h
+++ b/include/configs/cgtqmx6eval.h
@@ -22,9 +22,6 @@
 
 #define CONFIG_MACH_TYPE	4122
 
-#include <asm/arch/imx-regs.h>
-#include <asm/imx-common/gpio.h>
-
 #define CONFIG_CMDLINE_TAG
 #define CONFIG_SETUP_MEMORY_TAGS
 #define CONFIG_INITRD_TAG
@@ -62,9 +59,6 @@
 #define CONFIG_BAUDRATE			       115200
 
 /* Command definition */
-#include <config_cmd_default.h>
-
-#undef CONFIG_CMD_IMLS
 
 #define CONFIG_BOOTDELAY	       3
 
@@ -160,9 +154,7 @@
 #define CONFIG_SYS_INIT_SP_ADDR \
 	(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)
 
-/* FLASH and environment organization */
-#define CONFIG_SYS_NO_FLASH
-
+/* Environment organization */
 #define CONFIG_ENV_SIZE			(8 * 1024)
 
 #define CONFIG_ENV_IS_IN_MMC