i2c-piix4: Minor cleanups

* Remove a needless include.
* Remove a legacy comment in piix4_access.
* Minor optimization in piix4_access.

Signed-off-by: Jean Delvare <khali@linux-fr.org>

drivers/i2c/busses/i2c-piix4.c

@@ -38,7 +38,6 @@
 #include <linux/ioport.h>
 #include <linux/i2c.h>
 #include <linux/init.h>
-#include <linux/apm_bios.h>
 #include <linux/dmi.h>
 #include <asm/io.h>
 
@@ -343,12 +342,7 @@ static s32 piix4_access(struct i2c_adapter * adap, u16 addr,
 
 
 	switch (size) {
-	case PIIX4_BYTE:	/* Where is the result put? I assume here it is in
-				   SMBHSTDAT0 but it might just as well be in the
-				   SMBHSTCMD. No clue in the docs */
-
-		data->byte = inb_p(SMBHSTDAT0);
-		break;
+	case PIIX4_BYTE:
 	case PIIX4_BYTE_DATA:
 		data->byte = inb_p(SMBHSTDAT0);
 		break;