[PARISC] spelling fixes: arch/parisc/

Spelling fixes in arch/parisc/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Acked-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
diff --git a/arch/parisc/math-emu/sfsqrt.c b/arch/parisc/math-emu/sfsqrt.c
index cd3f6db..4657a12 100644
--- a/arch/parisc/math-emu/sfsqrt.c
+++ b/arch/parisc/math-emu/sfsqrt.c
@@ -76,7 +76,7 @@
                 }
                 /*
                  * Return quiet NaN or positive infinity.
-		 *  Fall thru to negative test if negative infinity.
+		 *  Fall through to negative test if negative infinity.
                  */
 		if (Sgl_iszero_sign(src) || Sgl_isnotzero_mantissa(src)) {
                 	*dstptr = src;