[openwrt/openwrt] Revert "bmips: huawei-hg556a-c: use nvmem for wifi eeprom"

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch openwrt-25.12:
https://git.openwrt.org/c0dd42dcc47a76d63590feceafba01b04e256d8e

commit c0dd42dcc47a76d63590feceafba01b04e256d8e
Author: Rosen Penev <rosenp at gmail.com>
AuthorDate: Wed Feb 18 17:25:38 2026 -0800

    Revert "bmips: huawei-hg556a-c: use nvmem for wifi eeprom"
    
    This reverts commit 72f43ac220616fbd2f9658b9b60a861e8565a998.
    
    The NVMEM codepath does not perform automatic byte conversion. It can be
    fixed but the upstream version is quite different from the local
    mac80211 patch. Revert until mac80211 gets updated and the whole mess
    can get squared away.
    
    Signed-off-by: Rosen Penev <rosenp at gmail.com>
    Link: https://github.com/openwrt/openwrt/pull/22091
    Signed-off-by: Robert Marko <robimarko at gmail.com>
    (cherry picked from commit b270580deabb40fa7af702d35d32b1f9f80fd007)
---
 target/linux/bmips/dts/bcm6358-huawei-hg556a-c.dts | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/target/linux/bmips/dts/bcm6358-huawei-hg556a-c.dts b/target/linux/bmips/dts/bcm6358-huawei-hg556a-c.dts
index 5133e72476..2c948da6d7 100644
--- a/target/linux/bmips/dts/bcm6358-huawei-hg556a-c.dts
+++ b/target/linux/bmips/dts/bcm6358-huawei-hg556a-c.dts
@@ -38,26 +38,16 @@
 	};
 };
 
-&cal_data {
-	nvmem-layout {
-		compatible = "fixed-layout";
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		cal_data_1fe00: calibration at 1fe00 {
-			reg = <0x1fe00 0x200>;
-		};
-	};
-};
-
 &pci {
 	status = "okay";
 
 	wifi at 1,0 {
-		compatible = "pci1814,3062";
+		compatible = "pci0,0";
 		reg = <0x0800 0 0 0 0>;
 
-		nvmem-cells = <&cal_data_1fe00>, <&macaddr_cfe_6a0 1>;
-		nvmem-cell-names = "calibration", "mac-address";
+		ralink,mtd-eeprom = <&cal_data 0x1fe00>;
+
+		nvmem-cells = <&macaddr_cfe_6a0 1>;
+		nvmem-cell-names = "mac-address";
 	};
 };