[PATCH 2/5] mfd: rk8xx: Add RK816 support

[kernel test robot]

Hi Alex,

kernel test robot noticed the following build warnings:

[auto build test WARNING on lee-mfd/for-mfd-next]
[also build test WARNING on lee-mfd/for-mfd-fixes broonie-regulator/for-next robh/for-next linus/master v6.8 next-20240322]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Alex-Bee/dt-bindings-mfd-Add-rk816-binding/20240321-224318
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
patch link:    https://lore.kernel.org/r/20240321143911.90210-5-knaerzche%40gmail.com
patch subject: [PATCH 2/5] mfd: rk8xx: Add RK816 support
config: arc-randconfig-001-20240322 (https://download.01.org/0day-ci/archive/20240323/202403231417.oV6q6CGc-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240323/202403231417.oV6q6CGc-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403231417.oV6q6CGc-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/mfd/rk8xx-core.c:395:8: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     395 | static const unsigned int rk816_get_irq_reg(struct regmap_irq_chip_data *data,
         |        ^~~~~


vim +395 drivers/mfd/rk8xx-core.c

   394	
 > 395	static const unsigned int rk816_get_irq_reg(struct regmap_irq_chip_data *data,
   396						    unsigned int base, int index)
   397	{
   398		unsigned int irq_reg = base;
   399	
   400		switch (base) {
   401		case RK816_INT_STS_REG1:
   402			irq_reg += rk816_irq_status_offsets[index];
   403			break;
   404		case RK816_INT_STS_MSK_REG1:
   405			irq_reg += rk816_irq_mask_offsets[index];
   406			break;
   407		}
   408	
   409		return irq_reg;
   410	};
   411	

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