staging: rtl8712: fix camel case in function r8712_generate_ie
Adhere to linux kernel coding style.
Reported by checkpatch:
CHECK: Avoid CamelCase: <beaconPeriod>
Signed-off-by: Mahak Gupta <mahak_g@cs.iitr.ac.in>
Link: https://lore.kernel.org/r/20220407120945.31030-1-mahak_g@cs.iitr.ac.in
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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