sunxi-mali-mainline-driver: set parallel build according to buildroot

sunxi-mali-mainline-driver builds using parallel compilation by default,
using -j $(nproc), but this could be not wanted.

Pass -j $(PARALLEL_JOBS) to build using jobs configured in buildroot.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/sunxi-mali-mainline-driver/sunxi-mali-mainline-driver.mk

@@ -23,12 +23,12 @@ SUNXI_MALI_MAINLINE_DRIVER_POST_PATCH_HOOKS += SUNXI_MALI_MAINLINE_DRIVER_USE_AP
 
 define SUNXI_MALI_MAINLINE_DRIVER_BUILD_CMDS
 	cd $(@D) && $(SUNXI_MALI_MAINLINE_DRIVER_MAKE_OPTS) \
-		$(SHELL) ./build.sh -r $(SUNXI_MALI_MAINLINE_REV) -b
+		$(SHELL) ./build.sh -r $(SUNXI_MALI_MAINLINE_REV) -j $(PARALLEL_JOBS) -b
 endef
 
 define SUNXI_MALI_MAINLINE_DRIVER_INSTALL_TARGET_CMDS
 	cd $(@D) && $(SUNXI_MALI_MAINLINE_DRIVER_MAKE_OPTS) \
-		$(SHELL) ./build.sh -r $(SUNXI_MALI_MAINLINE_REV) -i
+		$(SHELL) ./build.sh -r $(SUNXI_MALI_MAINLINE_REV) -j $(PARALLEL_JOBS) -i
 endef
 
 $(eval $(generic-package))