spi: at91-usart: add power management support

This patch implements power management callback function for USART as
SPI driver.

Signed-off-by: Radu Pirea <radu_nicolae.pirea@upb.ro>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Radu Pirea 2018-11-21 13:27:30 +02:00 • committed by Mark Brown
commit 96ed3ecde2
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