package/pixman: really enable NEON support on AArch64

The test to enable NEON on AArch64 is as following:

ifeq ($(BR2_aarch64)$(BR2_ARM_CPU_HAS_NEON),yy)

It cannot be to true as $(BR2_aarch64) and $(BR2_ARM_CPU_HAS_NEON) are
mutually exclusive. NEON is compulsory on AArch64 so remove
$(BR2_ARM_CPU_HAS_NEON) from the test.

Fixes: ba2fb599cd002b57fa70e978d91884c98d8aad05 ("package/pixman: bump to version 0.44.2")
Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/pixman/pixman.mk

@@ -68,7 +68,7 @@ else
 PIXMAN_CONF_OPTS += -Dneon=disabled
 endif
 
-ifeq ($(BR2_aarch64)$(BR2_ARM_CPU_HAS_NEON),yy)
+ifeq ($(BR2_aarch64),y)
 PIXMAN_CONF_OPTS += -Da64-neon=enabled
 else
 PIXMAN_CONF_OPTS += -Da64-neon=disabled