arm: omap: sata: compile out board-level sata code when CONFIG_DM_SCSI is defined

When CONFIG_DM_SCSI is defined, the SATA initialization will be implemented
in the scsi-uclass driver.
Signed-off-by: NJean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: NTom Rini <trini@konsulko.com>

arch/arm/mach-omap2/Makefile

@@ -29,9 +29,11 @@ obj-y	+= abb.o
 endif
 
 ifneq ($(CONFIG_OMAP54XX),)
+ifeq ($(CONFIG_DM_SCSI),)
 obj-y	+= pipe3-phy.o
 obj-$(CONFIG_SCSI_AHCI_PLAT) += sata.o
 endif
+endif
 
 ifeq ($(CONFIG_SYS_DCACHE_OFF),)
 obj-y	+= omap-cache.o