[openwrt/openwrt] ipq807x: add nvmem uboot-env support

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/952c738c0fe360ae074fbf6a87d03883157bc2dd

commit 952c738c0fe360ae074fbf6a87d03883157bc2dd
Author: André Valentin <avalentin at marcant.net>
AuthorDate: Tue Jan 17 23:07:42 2023 +0100

    ipq807x: add nvmem uboot-env support
    
    Enabling kernel symbol CONFIG_NVMEM_U_BOOT_ENV allows to use u-boot
    environement variable ethaddr with nvmen. That way it is possible to assign
    the MAC address to the ethernet device driver.
    
    Example of usage in dts:
    ....
            partition at 600000 {
                            compatible = "u-boot,env";
                            label = "0:appsblenv";
                            reg = <0x600000 0x10000>;
    
                            macaddr_lan: ethaddr {
                            };
            };
    ....
    &dp5 {
            status = "okay";
            phy-handle = <&qca8081>;
            label = "wan";
            nvmem-cells = <&macaddr_lan>;
            nvmem-cell-names = "mac-address-ascii";
            mac-address-increment = <1>;
    };
    
    This is needed for Zyxel NBG7815.
    
    Signed-off-by: André Valentin <avalentin at marcant.net>
---
 target/linux/ipq807x/config-5.15 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/ipq807x/config-5.15 b/target/linux/ipq807x/config-5.15
index f979f9a28a..4a5aee7d9e 100644
--- a/target/linux/ipq807x/config-5.15
+++ b/target/linux/ipq807x/config-5.15
@@ -257,6 +257,7 @@ CONFIG_NVIDIA_CARMEL_CNP_ERRATUM=y
 CONFIG_NVMEM=y
 CONFIG_NVMEM_QCOM_QFPROM=y
 # CONFIG_NVMEM_SPMI_SDAM is not set
+CONFIG_NVMEM_U_BOOT_ENV=y
 CONFIG_NVMEM_SYSFS=y
 CONFIG_OF=y
 CONFIG_OF_ADDRESS=y