MIPS: txx9: Constify bin_attribute arguments of txx9_sram_{read,write}()

MIPS: txx9: Constify bin_attribute arguments of txx9_sram_{read,write}()

If CONFIG_MACH_TX49XX=y:

    arch/mips/txx9/generic/setup.c: In function ‘txx9_sramc_init’:
    arch/mips/txx9/generic/setup.c:839:32: error: assignment to ‘ssize_t (*)(struct file *, struct kobject *, const struct bin_attribute *, char *, loff_t,  size_t)’ {aka ‘long int (*)(struct file *, struct kobject *, const struct bin_attribute *, char *, long long int,  long unsigned int)’} from incompatible pointer type ‘ssize_t (*)(struct file *, struct kobject *, struct bin_attribute *, char *, loff_t,  size_t)’ {aka ‘long int (*)(struct file *, struct kobject *, struct bin_attribute *, char *, long long int,  long unsigned int)’} [-Werror=incompatible-pointer-types]
      839 |         dev->bindata_attr.read = txx9_sram_read;
	  |                                ^
    arch/mips/txx9/generic/setup.c:840:33: error: assignment to ‘ssize_t (*)(struct file *, struct kobject *, const struct bin_attribute *, char *, loff_t,  size_t)’ {aka ‘long int (*)(struct file *, struct kobject *, const struct bin_attribute *, char *, long long int,  long unsigned int)’} from incompatible pointer type ‘ssize_t (*)(struct file *, struct kobject *, struct bin_attribute *, char *, loff_t,  size_t)’ {aka ‘long int (*)(struct file *, struct kobject *, struct bin_attribute *, char *, long long int,  long unsigned int)’} [-Werror=incompatible-pointer-types]
      840 |         dev->bindata_attr.write = txx9_sram_write;
	  |                                 ^

Fixes: 97d06802d10a2827 ("sysfs: constify bin_attribute argument of bin_attribute::read/write()")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>