SBE now supports parallel build

c788b0ff0745169e33c95cbe5bae88948339295f brought in the needed SBE
changes to support 'make -j', and it greatly improves build time.

Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
diff --git a/openpower/package/sbe/sbe.mk b/openpower/package/sbe/sbe.mk
index 0cc1942..987a9c0 100644
--- a/openpower/package/sbe/sbe.mk
+++ b/openpower/package/sbe/sbe.mk
@@ -14,7 +14,7 @@
 SBE_INSTALL_TARGET = NO
 
 define SBE_BUILD_CMDS
-	SBE_COMMIT_ID=$(SBE_VERSION) $(MAKE1) -C $(@D) \
+	SBE_COMMIT_ID=$(SBE_VERSION) $(MAKE) -C $(@D) \
 		LD_LIBRARY_PATH=$(HOST_DIR)/usr/lib \
 		CROSS_COMPILER_PATH=$(PPE42_GCC_BIN) \
 		all