arm: socfpga: config: Move SPL GD and malloc to RAM

Now that the SPL structure is organised such that it matches the
U-Boot's SPL design, it is possible to use the option of relocating
GD to RAM. And since we have GD in RAM, move malloc area to RAM as
well. We point the malloc base pointer 1 MiB past U-Boot's load
address. We use simple malloc for SPL because it is 3kiB smaller
in terms of code size than regular malloc which was used thus far.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/configs/socfpga_arria5_defconfig b/configs/socfpga_arria5_defconfig
index ee03156..4d1cd21 100644
--- a/configs/socfpga_arria5_defconfig
+++ b/configs/socfpga_arria5_defconfig
@@ -14,3 +14,6 @@
 CONFIG_DM_SPI=y
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SPL_SPI_SUPPORT=y
+CONFIG_SPL_STACK_R=y
+CONFIG_SPL_STACK_R_ADDR=0x00800000
+CONFIG_SYS_MALLOC_F_LEN=0x2000
diff --git a/configs/socfpga_cyclone5_defconfig b/configs/socfpga_cyclone5_defconfig
index 75ed347..ae3a1de 100644
--- a/configs/socfpga_cyclone5_defconfig
+++ b/configs/socfpga_cyclone5_defconfig
@@ -17,3 +17,6 @@
 CONFIG_DM_SPI=y
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SPL_SPI_SUPPORT=y
+CONFIG_SPL_STACK_R=y
+CONFIG_SPL_STACK_R_ADDR=0x00800000
+CONFIG_SYS_MALLOC_F_LEN=0x2000
diff --git a/configs/socfpga_socrates_defconfig b/configs/socfpga_socrates_defconfig
index 2e50ce9..71d4711 100644
--- a/configs/socfpga_socrates_defconfig
+++ b/configs/socfpga_socrates_defconfig
@@ -17,3 +17,6 @@
 CONFIG_DM_SPI=y
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SPL_SPI_SUPPORT=y
+CONFIG_SPL_STACK_R=y
+CONFIG_SPL_STACK_R_ADDR=0x00800000
+CONFIG_SYS_MALLOC_F_LEN=0x2000