fix dequantize register error

[karl2015]

No description provided.

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[coveralls]

Coverage remained the same at ?% when pulling c642022 on karl2015:master into 8fda293 on Tencent:master.

[nihui]

and also this one ?

ncnn/src/layer/arm/dequantize_arm.cpp

Line 274 in c642022

: "cc", "memory", "q0", "q1", "q2", "q4", "q10", "q12"

[karl2015]

and also this one ?

ncnn/src/layer/arm/dequantize_arm.cpp

Line 274 in c642022

: "cc", "memory", "q0", "q1", "q2", "q4", "q10", "q12"

missed，pull new request