Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>

arch/mips/include/asm/sn/sn0/hubio.h

@@ -622,7 +622,7 @@ typedef union h1_icrbb_u {
  */
 #define	IIO_ICRB_PROC0		0	/* Source of request is Proc 0 */
 #define	IIO_ICRB_PROC1		1	/* Source of request is Proc 1 */
-#define	IIO_ICRB_GB_REQ		2	/* Source is Guranteed BW request */
+#define	IIO_ICRB_GB_REQ		2	/* Source is Guaranteed BW request */
 #define	IIO_ICRB_IO_REQ		3	/* Source is Normal IO request	*/
 
 /*