nettle: use the BR2_ARM_CPU_ARM* options

Adjust the nettle package to use the BR2_ARM_CPU_ARM* option to
disable the usage of assembly code on ARMv4 and ARMv5.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/nettle/nettle.mk

@@ -15,7 +15,7 @@ NETTLE_LICENSE_FILES = COPYING.LIB
 NETTLE_CONF_OPTS = --disable-openssl
 
 # ARM assembly requires v6+ ISA
-ifeq ($(BR2_arm920t)$(BR2_arm922t)$(BR2_arm926t)$(BR2_fa526)$(BR2_strongarm)$(BR2_xscale)$(BR2_iwmmxt),y)
+ifeq ($(BR2_ARM_CPU_ARMV4)$(BR2_ARM_CPU_ARMV5),y)
 NETTLE_CONF_OPTS += --disable-assembler
 endif