Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/parisc/math-emu/fmpyfadd.c b/arch/parisc/math-emu/fmpyfadd.c
index 5dd7f93..b067c45 100644
--- a/arch/parisc/math-emu/fmpyfadd.c
+++ b/arch/parisc/math-emu/fmpyfadd.c
@@ -531,7 +531,7 @@
 		sign_save = Dbl_signextendedsign(resultp1);
 		if (Dbl_iszero_hidden(resultp1)) {
 			/* Handle normalization */
-		/* A straight foward algorithm would now shift the
+		/* A straightforward algorithm would now shift the
 		 * result and extension left until the hidden bit
 		 * becomes one.  Not all of the extension bits need
 		 * participate in the shift.  Only the two most 
@@ -1191,7 +1191,7 @@
 		sign_save = Dbl_signextendedsign(resultp1);
 		if (Dbl_iszero_hidden(resultp1)) {
 			/* Handle normalization */
-		/* A straight foward algorithm would now shift the
+		/* A straightforward algorithm would now shift the
 		 * result and extension left until the hidden bit
 		 * becomes one.  Not all of the extension bits need
 		 * participate in the shift.  Only the two most 
@@ -1841,7 +1841,7 @@
 		sign_save = Sgl_signextendedsign(resultp1);
 		if (Sgl_iszero_hidden(resultp1)) {
 			/* Handle normalization */
-		/* A straight foward algorithm would now shift the
+		/* A straightforward algorithm would now shift the
 		 * result and extension left until the hidden bit
 		 * becomes one.  Not all of the extension bits need
 		 * participate in the shift.  Only the two most 
@@ -2483,7 +2483,7 @@
 		sign_save = Sgl_signextendedsign(resultp1);
 		if (Sgl_iszero_hidden(resultp1)) {
 			/* Handle normalization */
-		/* A straight foward algorithm would now shift the
+		/* A straightforward algorithm would now shift the
 		 * result and extension left until the hidden bit
 		 * becomes one.  Not all of the extension bits need
 		 * participate in the shift.  Only the two most