treewide: Use sizeof_field() macro

Replace all the occurrences of FIELD_SIZEOF() with sizeof_field() except
at places where these are defined. Later patches will remove the unused
definition of FIELD_SIZEOF().

This patch is generated using following script:

EXCLUDE_FILES="include/linux/stddef.h|include/linux/kernel.h"

git grep -l -e "\bFIELD_SIZEOF\b" | while read file;
do

	if [[ "$file" =~ $EXCLUDE_FILES ]]; then
		continue
	fi
	sed -i  -e 's/\bFIELD_SIZEOF\b/sizeof_field/g' $file;
done

Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
Link: https://lore.kernel.org/r/20190924105839.110713-3-pankaj.laxminarayan.bharadiya@intel.com
Co-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: David Miller <davem@davemloft.net> # for net

fs/verity/enable.c

@@ -315,7 +315,7 @@ int fsverity_ioctl_enable(struct file *filp, const void __user *uarg)
 	if (arg.block_size != PAGE_SIZE)
 		return -EINVAL;
 
-	if (arg.salt_size > FIELD_SIZEOF(struct fsverity_descriptor, salt))
+	if (arg.salt_size > sizeof_field(struct fsverity_descriptor, salt))
 		return -EMSGSIZE;
 
 	if (arg.sig_size > FS_VERITY_MAX_SIGNATURE_SIZE)