Add support for USB and SDIO clocks.
Report unsupported setups and panic.
Signed-off-by: NMarc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>

Provide support for Sigma Designs Tango4 clock generator.
NOTE: This driver is incompatible with Tango3 clkgen.
Signed-off-by: NMarc Gonzalez <marc_gonzalez@sigmadesigns.com>
[sboyd@codeaurora.org: Add kernel.h include for panic/sprintf]
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>