splitter brcm Wi-Fi firmware to firmware-brcm-wifi

[junzhuimx]

firmware-nxp-wifi contains Wi-Fi firmware from NXP only

[thochstein]

Hi Jun, what is the benefit of moving this package to a separate recipe?

[junzhuimx]

firmware-nxp-wifi is defined for NXP Wi-Fi but bcm4359 is a "black sheep", as it is used for Cypress (Broadcom) Wi-Fi module.
And BRCM4359 does not upstream to linux-firmware.git, so the separate recipe should be more reasonable.

[otavio]

I don't really see the point of splitting the recipe up if it's all coming from the same repository. It seems like it would just make things more complicated and harder to manage in the long run. Maybe we could find a way to upstream the firmware instead?

[junzhuimx]

@otavio
There is no more updates for bcm4359 firmware in imx-firmware.git. So after thus splitting, no more maintain needs for the recipe "firmware-brcm-wifi" until Cypress upstream them to linux-firmware.git.
We only focus on the firmware-nxp-wifi, which provides the latest NXP firmware for community/customers to "earlier" access.

[otavio]

#1645 seems to address all issues. Can we close this?

[junzhuimx]

@otavio
#1645 is for NXP Wi-Fi firmware only.
This PR is just splitter BRCM firmware to new recipe. and does not conflict with #1645