Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

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

Documentation/input/joystick-parport.txt

@@ -272,7 +272,7 @@ if you want to use gamecon.c.
 
   Also, the connection is a bit more complex. You'll need a bunch of diodes,
 and one pullup resistor. First, you connect the Directions and the button
-the same as for db9, however with the diodes inbetween.
+the same as for db9, however with the diodes between.
 
 	    Diodes
 (pin 2) -----|<|----> Up

Documentation/input/rotary-encoder.txt

@@ -46,7 +46,7 @@ c) Falling edge on channel A, channel B in high state
 
 d) Falling edge on channel B, channel A in low state
 	Parking position. If the encoder enters this state, a full transition
-	should have happend, unless it flipped back on half the way. The
+	should have happened, unless it flipped back on half the way. The
 	'armed' state tells us about that.
 
 2. Platform requirements

Documentation/input/walkera0701.txt

@@ -77,7 +77,7 @@ pulse length:
 
 24 bin+oct values + 1 bin value = 24*4+1 bits  = 97 bits
 
-(Warning, pulses on ACK ar inverted by transistor, irq is rised up on sync
+(Warning, pulses on ACK are inverted by transistor, irq is raised up on sync
 to bin change or octal value to bin change).
 
 Binary data representations: