intel_th: Fix integer mismatch warnings

Use unsigned long in place of size_t to operate on buffer sizes and
offsets to clean up the 32 bit build.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/hwtracing/intel_th/msu.c

@@ -1056,7 +1056,7 @@ static int intel_th_msc_release(struct inode *inode, struct file *file)
 static ssize_t
 msc_single_to_user(struct msc *msc, char __user *buf, loff_t off, size_t len)
 {
-	size_t size = msc->nr_pages << PAGE_SHIFT, rem = len;
+	unsigned long size = msc->nr_pages << PAGE_SHIFT, rem = len;
 	unsigned long start = off, tocopy = 0;
 
 	if (msc->single_wrap) {