pinctrl: generic: Fix typos and clarify comments

Drive strength controls both sink and source currents, clarify the
description accordingly.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

include/linux/pinctrl/pinconf-generic.h

@@ -37,17 +37,17 @@
  *	if it is 0, pull-down is disabled.
  * @PIN_CONFIG_DRIVE_PUSH_PULL: the pin will be driven actively high and
  *	low, this is the most typical case and is typically achieved with two
- *	active transistors on the output. Sending this config will enabale
+ *	active transistors on the output. Setting this config will enable
  *	push-pull mode, the argument is ignored.
  * @PIN_CONFIG_DRIVE_OPEN_DRAIN: the pin will be driven with open drain (open
  *	collector) which means it is usually wired with other output ports
- *	which are then pulled up with an external resistor. Sending this
- *	config will enabale open drain mode, the argument is ignored.
+ *	which are then pulled up with an external resistor. Setting this
+ *	config will enable open drain mode, the argument is ignored.
  * @PIN_CONFIG_DRIVE_OPEN_SOURCE: the pin will be driven with open source
- *	(open emitter). Sending this config will enabale open drain mode, the
+ *	(open emitter). Setting this config will enable open drain mode, the
  *	argument is ignored.
- * @PIN_CONFIG_DRIVE_STRENGTH: the pin will output the current passed as
- * 	argument. The argument is in mA.
+ * @PIN_CONFIG_DRIVE_STRENGTH: the pin will sink or source at most the current
+ *	passed as argument. The argument is in mA.
  * @PIN_CONFIG_INPUT_SCHMITT_ENABLE: control schmitt-trigger mode on the pin.
  *      If the argument != 0, schmitt-trigger mode is enabled. If it's 0,
  *      schmitt-trigger mode is disabled.