speakup: use SPKDIR=$(src) to specify the source directory

Commit e68a558 ("speakup: Fix building as extmod") was intended
to support building this as an external module.

Since commit b1992c3 ("kbuild: use $(src) instead of
$(srctree)/$(src) for source directory"), $(src) consistently points
to the source directory, regardless of whether it is compiled as an
external module or not.

Signed-off-by: Masahiro Yamada <[email protected]>
Reviewed-by: Nicolas Schier <[email protected]>

Author: masahir0y

drivers/accessibility/speakup/Makefile

@@ -40,9 +40,7 @@ hostprogs += makemapdata
 makemapdata-objs := makemapdata.o
 
 quiet_cmd_mkmap = MKMAP   $@
-      cmd_mkmap = TOPDIR=$(srctree) \
-		  SPKDIR=$(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD),$(srctree)/drivers/accessibility/speakup) \
-		  $(obj)/makemapdata > $@
+      cmd_mkmap = TOPDIR=$(srctree) SPKDIR=$(src) $(obj)/makemapdata > $@
 
 $(obj)/mapdata.h: $(obj)/makemapdata
 	$(call cmd,mkmap)