pinctrl: remove unnecessary max pin number

This patch removes maxpin member in the pin control descriptor
because we don't need this value as we enumerate a pin space
using offset.

Signed-off-by: Chanho Park <[e-mail]>
Signed-off-by: Kyungmin Park <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/core.c

···
 	unsigned i, pin;
 
 	seq_printf(s, "registered pins: %d\n", pctldev->desc->npins);
-	seq_printf(s, "max pin number: %d\n", pctldev->desc->maxpin);
 
 	/* The pin number can be retrived from the pin controller descriptor */
 	for (i = 0; i < pctldev->desc->npins; i++) {

drivers/pinctrl/pinctrl-sirf.c

···
 	.name = DRIVER_NAME,
 	.pins = sirfsoc_pads,
 	.npins = ARRAY_SIZE(sirfsoc_pads),
-	.maxpin = SIRFSOC_NUM_PADS - 1,
 	.pctlops = &sirfsoc_pctrl_ops,
 	.pmxops = &sirfsoc_pinmux_ops,
 	.owner = THIS_MODULE,

drivers/pinctrl/pinctrl-u300.c

···
 	.name = DRIVER_NAME,
 	.pins = u300_pads,
 	.npins = ARRAY_SIZE(u300_pads),
-	.maxpin = U300_NUM_PADS-1,
 	.pctlops = &u300_pctrl_ops,
 	.pmxops = &u300_pmx_ops,
 	.owner = THIS_MODULE,

include/linux/pinctrl/pinctrl.h

···
  *	this pin controller
  * @npins: number of descriptors in the array, usually just ARRAY_SIZE()
  *	of the pins field above
- * @maxpin: since pin spaces may be sparse, there can he "holes" in the
- *	pin range, this attribute gives the maximum pin number in the
- *	total range. This should not be lower than npins for example,
- *	but may be equal to npins if you have no holes in the pin range.
  * @pctlops: pin control operation vtable, to support global concepts like
  *	grouping of pins, this is optional.
  * @pmxops: pinmux operations vtable, if you support pinmuxing in your driver
···
 	const char *name;
 	struct pinctrl_pin_desc const *pins;
 	unsigned int npins;
-	unsigned int maxpin;
 	struct pinctrl_ops *pctlops;
 	struct pinmux_ops *pmxops;
 	struct pinconf_ops *confops;