net: devlink: add DEVLINK_INFO_VERSION_GENERIC_FW_BOOTLOADER

As discussed in [1], abbreviating the bootloader to "bl" might not be
well understood. Instead, a bootloader technically being a firmware,
name it "fw.bootloader".

Add a new macro to devlink.h to formalize this new info attribute name
and update the documentation.

[1] https://lore.kernel.org/netdev/20221128142723.2f826d20@kernel.org/Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20221130174658.29282-5-mailhol.vincent@wanadoo.frSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Documentation/networking/devlink/devlink-info.rst

@@ -198,6 +198,11 @@ fw.bundle_id
 
 Unique identifier of the entire firmware bundle.
 
+fw.bootloader
+-------------
+
+Version of the bootloader.
+
 Future work
 ===========
 

include/net/devlink.h

@@ -621,6 +621,8 @@ enum devlink_param_generic_id {
 #define DEVLINK_INFO_VERSION_GENERIC_FW_ROCE	"fw.roce"
 /* Firmware bundle identifier */
 #define DEVLINK_INFO_VERSION_GENERIC_FW_BUNDLE_ID	"fw.bundle_id"
+/* Bootloader */
+#define DEVLINK_INFO_VERSION_GENERIC_FW_BOOTLOADER	"fw.bootloader"
 
 /**
  * struct devlink_flash_update_params - Flash Update parameters