Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/mips/pci/pci-octeon.c b/arch/mips/pci/pci-octeon.c
index 2d74fc9..ed1c542 100644
--- a/arch/mips/pci/pci-octeon.c
+++ b/arch/mips/pci/pci-octeon.c
@@ -441,7 +441,7 @@
 
 	/*
 	 * TDOMC must be set to one in PCI mode. TDOMC should be set to 4
-	 * in PCI-X mode to allow four oustanding splits. Otherwise,
+	 * in PCI-X mode to allow four outstanding splits. Otherwise,
 	 * should not change from its reset value. Don't write PCI_CFG19
 	 * in PCI mode (0x82000001 reset value), write it to 0x82000004
 	 * after PCI-X mode is known. MRBCI,MDWE,MDRE -> must be zero.
@@ -515,7 +515,7 @@
 #endif	/* USE_OCTEON_INTERNAL_ARBITER */
 
 	/*
-	 * Preferrably written to 1 to set MLTD. [RDSATI,TRTAE,
+	 * Preferably written to 1 to set MLTD. [RDSATI,TRTAE,
 	 * TWTAE,TMAE,DPPMR -> must be zero. TILT -> must not be set to
 	 * 1..7.
 	 */