trivial: Miscellaneous documentation typo fixes

Fix various typos in documentation txts.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm.txt

@@ -19,7 +19,7 @@ Example:
 	reg = <119c0 30>;
      }
 
-* Properties common to mulitple CPM/QE devices
+* Properties common to multiple CPM/QE devices
 
 - fsl,cpm-command : This value is ORed with the opcode and command flag
                     to specify the device on which a CPM command operates.

Documentation/powerpc/dts-bindings/fsl/msi-pic.txt

@@ -1,6 +1,6 @@
 * Freescale MSI interrupt controller
 
-Reguired properities:
+Required properties:
 - compatible : compatible list, contains 2 entries,
   first is "fsl,CHIP-msi", where CHIP is the processor(mpc8610, mpc8572,
   etc.) and the second is "fsl,mpic-msi" or "fsl,ipic-msi" depending on

Documentation/powerpc/dts-bindings/fsl/pmc.txt

@@ -15,8 +15,8 @@ Properties:
   compatible; all statements below that apply to "fsl,mpc8548-pmc" also
   apply to "fsl,mpc8641d-pmc".
 
-  Compatibility does not include bit assigments in SCCR/PMCDR/DEVDISR; these
-  bit assigments are indicated via the sleep specifier in each device's
+  Compatibility does not include bit assignments in SCCR/PMCDR/DEVDISR; these
+  bit assignments are indicated via the sleep specifier in each device's
   sleep property.
 
 - reg: For devices compatible with "fsl,mpc8349-pmc", the first resource