Merge: zl3073x: backport flashing feature to RHEL 10.2

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/merge_requests/1449

JIRA: https://issues.redhat.com/browse/RHEL-115367
Tested: Locally on GNR-D platform

Commits:
```
259ede9 ("dpll: zl3073x: Add functions to access hardware registers")
3639bd0 ("dpll: zl3073x: Add low-level flash functions")
ca01740 ("dpll: zl3073x: Add firmware loading functionality")
ebb1031 ("dpll: zl3073x: Refactor DPLL initialization")
a1e891f ("dpll: zl3073x: Implement devlink flash callback")
```

Signed-off-by: Ivan Vecera <ivecera@redhat.com>

Approved-by: Michal Schmidt <mschmidt@redhat.com>
Approved-by: Petr Oros <poros@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Scott Weaver <scweaver@redhat.com>

Author: swvrrh

Documentation/networking/devlink/zl3073x.rst

@@ -49,3 +49,17 @@ The ``zl3073x`` driver reports the following versions
       - running
       - 1.3.0.1
       - Device configuration version customized by OEM
+
+Flash Update
+============
+
+The ``zl3073x`` driver implements support for flash update using the
+``devlink-flash`` interface. It supports updating the device flash using a
+combined flash image ("bundle") that contains multiple components (firmware
+parts and configurations).
+
+During the flash procedure, the standard firmware interface is not available,
+so the driver unregisters all DPLLs and associated pins, and re-registers them
+once the flash procedure is complete.
+
+The driver does not support any overwrite mask flags.

drivers/dpll/zl3073x/Makefile

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
 obj-$(CONFIG_ZL3073X)		+= zl3073x.o
-zl3073x-objs			:= core.o devlink.o dpll.o prop.o
+zl3073x-objs			:= core.o devlink.o dpll.o flash.o fw.o prop.o
 
 obj-$(CONFIG_ZL3073X_I2C)	+= zl3073x_i2c.o
 zl3073x_i2c-objs		:= i2c.o