imx: define per SOC ..._PHYS_OFFSET and use these in favour of PHYS_OFFSET

This is a further step in allowing to build a kernel image for more
than one imx SOC.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/mach-mx3/mach-qong.c b/arch/arm/mach-mx3/mach-qong.c
index fdb819a..e5b5b83 100644
--- a/arch/arm/mach-mx3/mach-qong.c
+++ b/arch/arm/mach-mx3/mach-qong.c
@@ -275,7 +275,7 @@
 	/* Maintainer: DENX Software Engineering GmbH */
 	.phys_io        = MX31_AIPS1_BASE_ADDR,
 	.io_pg_offst    = (MX31_AIPS1_BASE_ADDR_VIRT >> 18) & 0xfffc,
-	.boot_params    = PHYS_OFFSET + 0x100,
+	.boot_params    = MX3x_PHYS_OFFSET + 0x100,
 	.map_io         = mx31_map_io,
 	.init_irq       = mx31_init_irq,
 	.init_machine   = mxc_board_init,