board: Phytec: phycore_am64x: Increase size for Image in SPI

Increase the maximum Image size from 23 MB to 26 MB by moving the
initramfs start address up. This gives us a bigger ranger to
provide kernel images which are not stripped down too much.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Reviewed-by: Wadim Egorov <w.egorov@phytec.de>
diff --git a/board/phytec/phycore_am64x/phycore_am64x.env b/board/phytec/phycore_am64x/phycore_am64x.env
index 3032b51..d69dfe7 100644
--- a/board/phytec/phycore_am64x/phycore_am64x.env
+++ b/board/phytec/phycore_am64x/phycore_am64x.env
@@ -21,4 +21,4 @@
 
 spi_fdt_addr=0x700000
 spi_image_addr=0x800000
-spi_ramdisk_addr=0x1e00000
+spi_ramdisk_addr=0x2200000