docs: update pin-control.rst references

Changeset 5513b411 ("Documentation: rename pinctl to pin-control")
renamed: Documentation/driver-api/pinctl.rst
to: Documentation/driver-api/pin-control.rst.

Update the cross-references accordingly.

Fixes: 5513b411 ("Documentation: rename pinctl to pin-control")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/46ac2e918c7c4a4b701d54870f167b78466ec578.1621413933.git.mchehab+huawei@kernel.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

include/linux/device.h

@@ -399,7 +399,7 @@ struct dev_links_info {
  * 		along with subsystem-level and driver-level callbacks.
  * @em_pd:	device's energy model performance domain
  * @pins:	For device pin management.
- *		See Documentation/driver-api/pinctl.rst for details.
+ *		See Documentation/driver-api/pin-control.rst for details.
  * @msi_list:	Hosts MSI descriptors
  * @msi_domain: The generic MSI domain this device is using.
  * @numa_node:	NUMA node this device is close to.

include/linux/mfd/madera/pdata.h

@@ -31,7 +31,7 @@ struct pinctrl_map;
  * @irq_flags:	    Mode for primary IRQ (defaults to active low)
  * @gpio_base:	    Base GPIO number
  * @gpio_configs:   Array of GPIO configurations (See
- *		    Documentation/driver-api/pinctl.rst)
+ *		    Documentation/driver-api/pin-control.rst)
  * @n_gpio_configs: Number of entries in gpio_configs
  * @gpsw:	    General purpose switch mode setting. Depends on the external
  *		    hardware connected to the switch. (See the SW1_MODE field

include/linux/pinctrl/pinconf-generic.h

@@ -89,7 +89,7 @@ struct pinctrl_map;
  * 	it.
  * @PIN_CONFIG_OUTPUT: this will configure the pin as an output and drive a
  * 	value on the line. Use argument 1 to indicate high level, argument 0 to
- *	indicate low level. (Please see Documentation/driver-api/pinctl.rst,
+ *	indicate low level. (Please see Documentation/driver-api/pin-control.rst,
  *	section "GPIO mode pitfalls" for a discussion around this parameter.)
  * @PIN_CONFIG_PERSIST_STATE: retain pin state across sleep or controller reset
  * @PIN_CONFIG_POWER_SOURCE: if the pin can select between different power