misc: bmp085: Use unsigned long to store jiffies

This fixes following compilation warning:

drivers/misc/bmp085.c: In function ‘bmp085_get_pressure’:
drivers/misc/bmp085.c:238:4: warning: comparison of distinct pointer
         types lacks a cast [enabled by default]
Signed-off-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/bmp085.c

@@ -87,7 +87,7 @@ struct bmp085_data {
 	u32 raw_temperature;
 	u32 raw_pressure;
 	unsigned char oversampling_setting;
-	u32 last_temp_measurement;
+	unsigned long last_temp_measurement;
 	s32 b6; /* calculated temperature correction coefficient */
 };