clk: lpc32xx: Constify struct regmap_config

`lpc32xx_scb_regmap_config` is not modified and can be declared as const
to move its data to a read-only section.

Signed-off-by: Javier Carrasco <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/nxp/clk-lpc32xx.c

···
 #define LPC32XX_USB_CLK_CTRL		0xF4
 #define LPC32XX_USB_CLK_STS		0xF8
 
-static struct regmap_config lpc32xx_scb_regmap_config = {
+static const struct regmap_config lpc32xx_scb_regmap_config = {
 	.name = "scb",
 	.reg_bits = 32,
 	.val_bits = 32,