clk: bcm2835: Constify struct debugfs_reg32

bcm2835_debugfs_clock_reg32 is never changed and can therefore be made
const.

This allows the compiler to put it in the text section instead of the
data section.

Before:
   text    data     bss     dec     hex filename
  26598   16088      64   42750    a6fe drivers/clk/bcm/clk-bcm2835.o

After:
   text    data     bss     dec     hex filename
  26662   16024      64   42750    a6fe drivers/clk/bcm/clk-bcm2835.o

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lkml.kernel.org/r/20200508220238.4883-1-rikard.falkeborn@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/bcm/clk-bcm2835.c

@@ -396,8 +396,8 @@ out:
 }
 
 static void bcm2835_debugfs_regset(struct bcm2835_cprman *cprman, u32 base,
-				  struct debugfs_reg32 *regs, size_t nregs,
-				  struct dentry *dentry)
+				   const struct debugfs_reg32 *regs,
+				   size_t nregs, struct dentry *dentry)
 {
 	struct debugfs_regset32 *regset;
 
@@ -1240,7 +1240,7 @@ static u8 bcm2835_clock_get_parent(struct clk_hw *hw)
 	return (src & CM_SRC_MASK) >> CM_SRC_SHIFT;
 }
 
-static struct debugfs_reg32 bcm2835_debugfs_clock_reg32[] = {
+static const struct debugfs_reg32 bcm2835_debugfs_clock_reg32[] = {
 	{
 		.name = "ctl",
 		.offset = 0,