regmap: clean up regmap allocation

Putting zero length array at the end of struct is a common technique
to embed arbitrary length of members.  There is no good reason to let
regmap_alloc_count() branch by "if (count <= 1)".

As far as I understood the code, regmap->base is an alias of
regmap->ranges[0].start, but it is not helpful but make the code
just ugly.

Rename regmap_alloc_count() to regmap_alloc() because the _count
suffix seems pointless.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
[trini: fixup cpu_info-rcar.c]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/pinctrl/pinctrl-sti.c b/drivers/pinctrl/pinctrl-sti.c
index ed137d6..f0cd845 100644
--- a/drivers/pinctrl/pinctrl-sti.c
+++ b/drivers/pinctrl/pinctrl-sti.c
@@ -61,7 +61,7 @@
 	int bank = pin_desc->bank;
 	int pin = pin_desc->pin;
 
-	sysconfreg = (unsigned long *)plat->regmap->base;
+	sysconfreg = (unsigned long *)plat->regmap->ranges[0].start;
 
 	switch (bank) {
 	case 0 ... 5:		/* in "SBC Bank" */
@@ -95,7 +95,7 @@
 	unsigned long *sysconfreg;
 	int bank = pin_desc->bank;
 
-	sysconfreg = (unsigned long *)plat->regmap->base + 40;
+	sysconfreg = (unsigned long *)plat->regmap->ranges[0].start + 40;
 
 	/*
 	 * NOTE: The PIO configuration for the PIO pins in the