arm-trusted-firmware-mediatek: add mt7988 4bg build

This allows builds for Bananapi R4 (Pro) with 8GB RAM.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>

Author: frank-w

package/boot/arm-trusted-firmware-mediatek/Makefile

@@ -645,6 +645,34 @@ define Trusted-Firmware-A/mt7988-spim-nand-ubi-ddr4
   USE_UBI:=1
 endef
 
+define Trusted-Firmware-A/mt7988-emmc-comb-4bg
+  NAME:=MediaTek MT7988 (eMMC, DDR4 8GB)
+  BOOT_DEVICE:=emmc
+  BUILD_SUBTARGET:=filogic
+  PLAT:=mt7988
+  DRAM_USE_COMB:=1
+  DDR4_4BG_MODE:=1
+endef
+
+define Trusted-Firmware-A/mt7988-sdmmc-comb-4bg
+  NAME:=MediaTek MT7988 (SD card, DDR4 8GB)
+  BOOT_DEVICE:=sdmmc
+  BUILD_SUBTARGET:=filogic
+  PLAT:=mt7988
+  DRAM_USE_COMB:=1
+  DDR4_4BG_MODE:=1
+endef
+
+define Trusted-Firmware-A/mt7988-spim-nand-ubi-comb-4bg
+  NAME:=MediaTek MT7988 (SPI-NAND via SPIM, UBI, DDR4 8GB)
+  BOOT_DEVICE:=spim-nand
+  BUILD_SUBTARGET:=filogic
+  PLAT:=mt7988
+  DRAM_USE_COMB:=1
+  DDR4_4BG_MODE:=1
+  USE_UBI:=1
+endef
+
 TFA_TARGETS:= \
 	mt7622-nor-1ddr \
 	mt7622-nor-2ddr \
@@ -716,7 +744,10 @@ TFA_TARGETS:= \
 	mt7988-snand-ubi-comb \
 	mt7988-spim-nand-comb \
 	mt7988-spim-nand-ubi-comb \
-	mt7988-spim-nand-ubi-ddr4
+	mt7988-spim-nand-ubi-ddr4 \
+	mt7988-emmc-comb-4bg \
+	mt7988-sdmmc-comb-4bg \
+	mt7988-spim-nand-ubi-comb-4bg
 
 TFA_MAKE_FLAGS += \
 	BOOT_DEVICE=$(BOOT_DEVICE) \