pitx-imx8m: add some distroboot env variables

- ramdisk_addr_r is required by distroboot spec.
- pxefile_addr_r is required by distroboot spec.
Signed-off-by: Thomas Schaefer <thomas.schaefer@kontron.com>

include/configs/pitx-imx8m.h

@@ -133,6 +133,13 @@
  */
 
 #ifndef CONFIG_SPL_BUILD
+#define DISTROBOOT_ENV_SETTINGS \
+	"fdt_addr_r=0x43000000\0" \
+	"kernel_addr_r=" __stringify(CONFIG_LOADADDR) "\0" \
+	"pxefile_addr_r=" __stringify(CONFIG_LOADADDR) "\0" \
+	"ramdisk_addr_r=0x44000000\0" \
+	"scriptaddr=0x40400000\0"
+
 #define BOOT_TARGET_DEVICES(func) \
 	func(MMC, mmc, 0) \
 	func(MMC, mmc, 1) \
@@ -140,6 +147,7 @@
 	func(DHCP, dhcp, 0)
 #include <config_distro_bootcmd.h>
 #else
+#define DISTROBOOT_ENV_SETTINGS
 #define BOOTENV
 #endif
 
@@ -148,16 +156,14 @@
 	"image=Image\0" 							\
 	"splashpos=m,m\0" 							\
 	"console=ttymxc2,115200 earlycon=ec_imx6q,0x30880000\0" 		\
-	"fdt_addr_r=0x43000000\0"						\
 	"fdt_high=0xffffffffffffffff\0"						\
 	"boot_fdt=try\0"							\
 	"fdtfile=pitx-imx8m_hdmi.dtb\0"						\
 	"initrd_addr=0x43800000\0"						\
 	"initrd_high=0xffffffffffffffff\0" 					\
-	"kernel_addr_r=" __stringify(CONFIG_LOADADDR) "\0"			\
-	"scriptaddr=0x40400000\0"						\
 	"boot_scripts=boot.scr.uimg boot.scr update_pitx/update.scr\0"		\
 	"video_off=yes\0"							\
+	DISTROBOOT_ENV_SETTINGS							\
 	BOOTENV