core: simplify the condition to set the strip command

Since BR2_STRIP_strip and BR2_STRIP_noine are mutually exclusive (being
part of a choice), we can simplify the logic.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/Makefile.in

@@ -205,8 +205,7 @@ ifeq ($(BR2_STRIP_strip),y)
 STRIP_STRIP_DEBUG := --strip-debug
 TARGET_STRIP = $(TARGET_CROSS)strip
 STRIPCMD = $(TARGET_CROSS)strip --remove-section=.comment --remove-section=.note
-endif
-ifeq ($(BR2_STRIP_none),y)
+else
 TARGET_STRIP = /bin/true
 STRIPCMD = $(TARGET_STRIP)
 endif