sb/amd/hudson/spi.c: Use C over CPP conditional

Change-Id: Ie6e2420813e1b3e8885499b4739b1222aa1b46e6
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63056
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/southbridge/amd/agesa/hudson/spi.c b/src/southbridge/amd/agesa/hudson/spi.c
index b2f9ff2..986f094 100644
--- a/src/southbridge/amd/agesa/hudson/spi.c
+++ b/src/southbridge/amd/agesa/hudson/spi.c
@@ -97,15 +97,15 @@
 
 	readoffby1 = bytesout ? 0 : 1;
 
-#if CONFIG(SOUTHBRIDGE_AMD_AGESA_YANGTZE)
-	spi_write(0x1E, 5);
-	spi_write(0x1F, bytesout); /* SpiExtRegIndx [5] - TxByteCount */
-	spi_write(0x1E, 6);
-	spi_write(0x1F, bytesin);  /* SpiExtRegIndx [6] - RxByteCount */
-#else
-	u8 readwrite = (bytesin + readoffby1) << 4 | bytesout;
-	spi_write(SPI_REG_CNTRL01, readwrite);
-#endif
+	if (CONFIG(SOUTHBRIDGE_AMD_AGESA_YANGTZE)) {
+		spi_write(0x1E, 5);
+		spi_write(0x1F, bytesout); /* SpiExtRegIndx [5] - TxByteCount */
+		spi_write(0x1E, 6);
+		spi_write(0x1F, bytesin);  /* SpiExtRegIndx [6] - RxByteCount */
+	} else {
+		u8 readwrite = (bytesin + readoffby1) << 4 | bytesout;
+		spi_write(SPI_REG_CNTRL01, readwrite);
+	}
 	spi_write(SPI_REG_OPCODE, cmd);
 
 	reset_internal_fifo_pointer();