Fix ARCHCONFIG for Neoverse-N1

../config_kernel.h:24:9: warning: missing whitespace after the macro name
   24 | #define ARMV8-march armv8.2-a
      |         ^~~~~

Author: andreas-schwab

getarch.c

@@ -1038,7 +1038,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        "-DL1_DATA_SIZE=65536 -DL1_DATA_LINESIZE=64 -DL1_DATA_ASSOCIATIVE=4 " \
        "-DL2_SIZE=1048576 -DL2_LINESIZE=64 -DL2_ASSOCIATIVE=16 " \
        "-DDTB_DEFAULT_ENTRIES=64 -DDTB_SIZE=4096 " \
-       "-DHAVE_VFPV4 -DHAVE_VFPV3 -DHAVE_VFP -DHAVE_NEON -DARMV8" \
+       "-DHAVE_VFPV4 -DHAVE_VFPV3 -DHAVE_VFP -DHAVE_NEON -DARMV8 " \
        "-march=armv8.2-a -mtune=cortex-a72"
 #define LIBNAME   "neoversen1"
 #define CORENAME  "NEOVERSEN1"