Fix typo in Makefile

This strangely breaks with gmake on FreeBSD, but seems to work with make
on Linux.

Thanks Idwer Vollering <vidwer@gmail.com> for noticing and testing.

Corresponding to flashrom svn r593.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
diff --git a/Makefile b/Makefile
index 54d662d..2ff241d 100644
--- a/Makefile
+++ b/Makefile
@@ -43,7 +43,7 @@
 LIBS += -lpci -lz
 
 OBJS = chipset_enable.o board_enable.o udelay.o jedec.o stm50flw0x0x.o \
-	sst28sf040.o am29f040b.o mx29f002.o m29f400bt.o pm29f002.c \
+	sst28sf040.o am29f040b.o mx29f002.o m29f400bt.o pm29f002.o \
 	w49f002u.o 82802ab.o pm49fl00x.o sst49lf040.o en29f002a.o \
 	sst49lfxxxc.o sst_fwhub.o layout.o cbtable.o flashchips.o physmap.o \
 	flashrom.o w39v080fa.o sharplhf00l04.o w29ee011.o spi.o it87spi.o \