clk_fixed: quiet by default
We may attach several of these devices, but there is no meaningful
information added to dmesg. For example:
ofwbus0: <Open Firmware Device Tree> clk_fixed0: <Fixed clock> on ofwbus0 clk_fixed1: <Fixed clock> on ofwbus0 clk_fixed2: <Fixed clock> on ofwbus0 clk_fixed3: <Fixed clock> on ofwbus0 clk_fixed4: <Fixed clock> on ofwbus0 clk_fixed5: <Fixed clock> on ofwbus0 clk_fixed6: <Fixed clock> on ofwbus0 clk_fixed7: <Fixed clock> on ofwbus0 clk_fixed8: <Fixed clock> on ofwbus0 clk_fixed9: <Fixed clock> on ofwbus0 clk_fixed10: <Fixed clock> on ofwbus0 clk_fixed11: <Fixed clock> on ofwbus0
To reduce this noise, quiet the devices for by default. For verbose
boot, the message will be emitted.
Reviewed by: manu
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D44266
(cherry picked from commit 1cb9f6f6413e9d242de47e730ec7d4ce3e5688fe)