memlayout.ld: Increase RAMSTAGE size to more than 1MB everywhere

This is in preparation of a larger heap. I went for 2MB because why not?

Change-Id: I51f999a10ba894a7f2f5fce224d30bf914107c38
Signed-off-by: Patrick Georgi <patrick@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78273
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
diff --git a/src/soc/mediatek/mt8183/memlayout.ld b/src/soc/mediatek/mt8183/memlayout.ld
index 3908426..c5d9d08 100644
--- a/src/soc/mediatek/mt8183/memlayout.ld
+++ b/src/soc/mediatek/mt8183/memlayout.ld
@@ -44,7 +44,7 @@
 	DRAM_START(0x40000000)
 	DRAM_DMA(0x40000000, 1M)
 	POSTRAM_CBFS_CACHE(0x40100000, 1M)
-	RAMSTAGE(0x40200000, 256K)
+	RAMSTAGE(0x40200000, 2M)
 
 	BL31(0x54600000, 0x60000)
 }