AP_HAL: Fix typos

libraries/AP_HAL/Device.h

@@ -39,7 +39,7 @@ public:
      * Set the speed of future transfers. Depending on the bus the speed may
      * be shared for all devices on the same bus.
      *
-     * Return: true if speed was succesfully set or platform doesn't implement
+     * Return: true if speed was successfully set or platform doesn't implement
      * it; false otherwise.
      */
     virtual bool set_speed(Speed speed)  = 0;

libraries/AP_HAL/I2CDriver.h

@@ -15,7 +15,7 @@ public:
     virtual uint8_t write(uint8_t addr, uint8_t len, uint8_t* data) = 0;
     /* writeRegister: write a single 8-bit value to a register */
     virtual uint8_t writeRegister(uint8_t addr, uint8_t reg, uint8_t val) = 0;
-    /* writeRegisters: write bytes to contigious registers */
+    /* writeRegisters: write bytes to contiguous registers */
     virtual uint8_t writeRegisters(uint8_t addr, uint8_t reg,
                                    uint8_t len, uint8_t* data) = 0;
 
@@ -25,13 +25,13 @@ public:
      * then reads back an 8-bit value. */
     virtual uint8_t readRegister(uint8_t addr, uint8_t reg, uint8_t* data) = 0;
 
-    /* readRegisters: read contigious device registers - writes the first 
+    /* readRegisters: read contiguous device registers - writes the first 
      * register, then reads back multiple bytes */
     virtual uint8_t readRegisters(uint8_t addr, uint8_t reg,
                                   uint8_t len, uint8_t* data) = 0;
 
 #if CONFIG_HAL_BOARD == HAL_BOARD_LINUX
-    /* readRegistersMultiple: read contigious device registers. 
+    /* readRegistersMultiple: read contiguous device registers. 
        Equivalent to count calls to readRegisters() */
     virtual uint8_t readRegistersMultiple(uint8_t addr, uint8_t reg,
                                           uint8_t len, uint8_t count, 

libraries/AP_HAL/RCInput.h

@@ -48,7 +48,7 @@ public:
     virtual bool set_overrides(int16_t *overrides, uint8_t len) = 0;
     /* set_override: set just a specific channel */
     virtual bool set_override(uint8_t channel, int16_t override) = 0;
-    /* clear_overrides: equivelant to setting all overrides to 0 */
+    /* clear_overrides: equivalent to setting all overrides to 0 */
     virtual void clear_overrides() = 0;
 
     /* execute receiver bind */