powerpc: ppc4xx: Add ramboot config for glacier

Add a new ramboot config for glacier so that it is possible to test U-Boot
loaded over Ethernet instead of using JTAG.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/glacier_ramboot_defconfig b/configs/glacier_ramboot_defconfig
new file mode 100644
index 0000000..4fc2303
--- /dev/null
+++ b/configs/glacier_ramboot_defconfig
@@ -0,0 +1,5 @@
+CONFIG_SYS_EXTRA_OPTIONS="SYS_RAMBOOT,SYS_TEXT_BASE=0x01000000,SYS_LDSCRIPT=board/amcc/canyonlands/u-boot-ram.lds"
+CONFIG_PPC=y
+CONFIG_4xx=y
+CONFIG_TARGET_CANYONLANDS=y
+CONFIG_GLACIER=y