ux500-firmware: use $(TARGET_MAKE_ENV) when calling $(MAKE)

And remove whitespace.

Signed-off-by: Gustavo Zacarias <gustavo.zacarias@free-electrons.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/ux500-firmware/ux500-firmware.mk

@@ -8,13 +8,13 @@ UX500_FIRMWARE_VERSION = 1.1.3-6
 UX500_FIRMWARE_SOURCE = ux500-firmware_$(UX500_FIRMWARE_VERSION)linaro1.tar.gz
 UX500_FIRMWARE_SITE = https://launchpad.net/~igloocommunity-maintainers/+archive/snowball/+files
 UX500_FIRMWARE_LICENSE = Snowball click-wrap license
-UX500_FIRMWARE_LICENSE_FILES = license.txt 
+UX500_FIRMWARE_LICENSE_FILES = license.txt
 UX500_FIRMWARE_REDISTRIBUTE = NO
 
 # The CG2900 linux driver has to load firmware named CG29XX_* but the firmware
 # filenames contained in this package are CG2900_* hence the code below
 define UX500_FIRMWARE_INSTALL_TARGET_CMDS
-	$(MAKE) -C $(@D) DESTDIR=$(TARGET_DIR) install
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) DESTDIR=$(TARGET_DIR) install
 	for f in $(TARGET_DIR)/lib/firmware/CG2900* ; do \
 		mv $$f $${f/CG2900/CG29XX}; \
 	done