Make bitbang_spi naming consistent

Corresponding to flashrom svn r741.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
diff --git a/flashrom.c b/flashrom.c
index 8eb3d39..c867842 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -713,7 +713,7 @@
 		exit(1);
 	}
 #if BITBANG_SPI_SUPPORT == 1
-	if (spi_bitbang_master_count - 1 != SPI_BITBANG_INVALID) {
+	if (bitbang_spi_master_count - 1 != BITBANG_SPI_INVALID) {
 		fprintf(stderr, "Bitbanging SPI master table miscompilation!\n");
 		exit(1);
 	}