package/speex: ARM5E needs ARM mode

Add a dependency on ARM mode for ARM5E to fix the following build
failure on Cortex-M3 which only supports Thumb2 mode:

/tmp/ccJHSu7y.s:158: Error: selected processor does not support `smulbb r1,r6,lr' in Thumb mode

Fixes:
 - http://autobuild.buildroot.org/results/1575da3a8ea2bcde7fa9885df317a12d5c36918f

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/speex/Config.in

@@ -18,6 +18,7 @@ config BR2_PACKAGE_SPEEX_ARM4
 config BR2_PACKAGE_SPEEX_ARM5E
 	bool
 	default y
-	depends on BR2_arm && !BR2_PACKAGE_SPEEX_ARM4
+	depends on BR2_arm && BR2_ARM_CPU_HAS_ARM && \
+		!BR2_PACKAGE_SPEEX_ARM4
 
 endif