net: ipa: replace ipa->suspend_ref with a flag bit
We take a clock reference in ipa_config() in order to prevent the the IPA clock from being shutdown until a power management suspend request arrives. An atomic field in the IPA structure records whether that extra reference had been taken. Rather than using an atomic to represent a Boolean value, define a new flags bitmap, and define a "clock held" flag to represent whether the extra clock reference has been taken. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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