bcm47xx: 6.12: fix no previous prototype error

Add patch to fix protype build errors

Signed-off-by: Kyle Hendry <kylehendrydev@gmail.com>

Author: kylehendrydev

target/linux/bcm47xx/patches-6.12/980-no-previous-prototype-fixes.patch

@@ -0,0 +1,22 @@
+--- a/drivers/bcma/driver_chipcommon_sflash.c
++++ b/drivers/bcma/driver_chipcommon_sflash.c
+@@ -93,7 +93,7 @@ static void bcma_sflash_cmd(struct bcma_
+ 	bcma_err(cc->core->bus, "SFLASH control command failed (timeout)!\n");
+ }
+ 
+-const struct bcma_sflash_tbl_e *bcma_sflash_shrink_flash(u32 id)
++static const struct bcma_sflash_tbl_e *bcma_sflash_shrink_flash(u32 id)
+ {
+ 	enum bcm47xx_board board = bcm47xx_board_get();
+ 	const struct bcma_sflash_tbl_e *e;
+--- a/drivers/firmware/broadcom/cfe_env.c
++++ b/drivers/firmware/broadcom/cfe_env.c
+@@ -21,6 +21,8 @@
+ static char _nvdata[NVRAM_SIZE];
+ static char _valuestr[256];
+ 
++char *cfe_env_get(unsigned char *nv_buf, const char *name);
++
+ /*
+  * TLV types.  These codes are used in the "type-length-value"
+  * encoding of the items stored in the NVRAM device (flash or EEPROM)