bcm27xx/bcm2712: add RP1 drivers via kmods #912

Job	Run time
Build all core packages for selected target / Determine Changed Files / Determine Changed Files	7s
Build all core packages for selected target / Determine Changed Packages / Determine Changed Packages	8s
Build all core packages for selected target / Build Packages with external toolchain (malta, be) / Set up build malta/be	8s
Build all core packages for selected target / Build Packages with external toolchain (x86, 64) / Set up build x86/64	5s
Build all core packages for selected target / Build Packages with external toolchain (x86, 64) / Build x86/64	1h 15m 53s
Build all core packages for selected target / Build Packages with external toolchain (x86, 64) / Check packages for x86/64	3m 34s
Build all core packages for selected target / Build Packages with external toolchain (malta, be) / Build malta/be	1h 9m 28s
Build all core packages for selected target / Build Packages with external toolchain (malta, be) / Check packages for malta/be	3m 22s
Build all core packages for selected target / Upload ccache cache to s3	0s
	2h 32m 45s

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