u-boot: Remove defaults for UBOOT_SUFFIX and SPL_BINARY

These were set to the defaults we would expect from OMAP class U-Boot,
but as all board families set these including the OMAP class MACHINEs
we can remove these defaults. This helps in the cases that we do not
want to define one of these, such as SPL_BINARY in the case of OMAP-L138
which does not use SPL.

Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Ryan Eatmon <reatmon@ti.com>

meta-ti-bsp/conf/machine/omapl138-lcdk.conf

@@ -6,7 +6,6 @@ require conf/machine/include/omapl138.inc
 
 UBOOT_MACHINE = "omapl138_lcdk_config"
 UBOOT_SUFFIX = "ais"
-SPL_BINARY = ""
 
 UBOOT_ENTRYPOINT = "0xc0008000"
 UBOOT_LOADADDRESS = "0xc0008000"

meta-ti-bsp/recipes-bsp/u-boot/u-boot-ti.inc

@@ -5,9 +5,6 @@ do_compile:prepend () {
     echo ${scm_version} > ${S}/.scmversion
 }
 
-UBOOT_SUFFIX ?= "img"
-SPL_BINARY ?= "MLO"
-
 require ${COREBASE}/meta/recipes-bsp/u-boot/u-boot-common.inc
 require ${COREBASE}/meta/recipes-bsp/u-boot/u-boot.inc
 require u-boot-mergeconfig.inc