feat(stm32mp13): change BL33 memory mapping

U-Boot is loaded at the beginning of the DDR:
STM32MP_DDR_BASE = 0xC0000000.

This patch remove the need to use the 0x100000 offset, reserved
on STM32MP15 for flashlayout.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Change-Id: I8d0a93f4db411cf59838e635a315c729cccee269
1 file changed