hpet: fix style problems

Fix the following style problems:

WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h>
WARNING: Use #include <linux/io.h> instead of <asm/io.h>
ERROR: code indent should use tabs where possible
ERROR: do not initialise statics to 0 or NULL
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/char/hpet.c

@@ -32,12 +32,12 @@
 #include <linux/bitops.h>
 #include <linux/compat.h>
 #include <linux/clocksource.h>
+#include <linux/uaccess.h>
 #include <linux/slab.h>
+#include <linux/io.h>
 
 #include <asm/current.h>
-#include <asm/uaccess.h>
 #include <asm/system.h>
-#include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/div64.h>
 
@@ -826,7 +826,7 @@ int hpet_alloc(struct hpet_data *hdp)
 	struct hpets *hpetp;
 	size_t siz;
 	struct hpet __iomem *hpet;
-	static struct hpets *last = NULL;
+	static struct hpets *last;
 	unsigned long period;
 	unsigned long long temp;
 	u32 remainder;