package/gpsd: use BR2_TOOLCHAIN_HAS_GCC_BUG_68485 option

The workaround for gcc's ICE works ok, but it's used if
BR2_microblaze=y with a local comment. Let's use
BR2_TOOLCHAIN_HAS_GCC_BUG_68485 instead to avoid repeating ICE bug
comment for every package affected by it.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/gpsd/gpsd.mk

@@ -42,10 +42,7 @@ else
 GPSD_SCONS_OPTS += libgpsmm=no
 endif
 
-# prevents from triggering GCC ICE
-# A bug was reported to the gcc bug tracker:
-# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68485
-ifeq ($(BR2_microblaze),y)
+ifeq ($(BR2_TOOLCHAIN_HAS_GCC_BUG_68485),y)
 GPSD_CFLAGS += -O0
 endif