arm: rmobile: Add HopeRun HiHope RZ/G2H board support

The HiHope RZ/G2H board from HopeRun consists of main board
(HopeRun HiHope RZ/G2H main board) and sub board(HopeRun
HiHope RZ/G2H sub board). The HiHope RZ/G2H sub board sits
below the HiHope RZ/G2H main board.

This patch adds the required board support to boot HopeRun HiHope
RZ/G2H board.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
diff --git a/configs/hihope_rzg2_defconfig b/configs/hihope_rzg2_defconfig
index 73245d9..69eaab0 100644
--- a/configs/hihope_rzg2_defconfig
+++ b/configs/hihope_rzg2_defconfig
@@ -32,7 +32,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_CONTROL=y
-CONFIG_OF_LIST="r8a774a1-hihope-rzg2m-u-boot r8a774b1-hihope-rzg2n-u-boot"
+CONFIG_OF_LIST="r8a774a1-hihope-rzg2m-u-boot r8a774b1-hihope-rzg2n-u-boot r8a774e1-hihope-rzg2h-u-boot"
 CONFIG_MULTI_DTB_FIT_LZO=y
 CONFIG_MULTI_DTB_FIT_USER_DEFINED_AREA=y
 CONFIG_ENV_OVERWRITE=y