ANDROID: tty: hvc_dcc: Add parameter to enable DCC
On cuttlefish device, DCC registers are unavailable and cause kernel to
crash if those registers are probed. Introduce a module parameter
("hvc_dcc.enable") to enable DCC at the kernel commandline.
Bug: 169129589
Change-Id: I0218d9e64443c881d163e484712edf18e42975fd
Signed-off-by:
Elliot Berman <eberman@codeaurora.org>
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