usb: gadget: mass_storage: added sysfs entry for cdrom to LUNs#4

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FrozenCow:OnePlusOSS_oneplus_msm8994_5.1.1_gadget_cdromFrozenCow/android_kernel_oneplus_msm8994:OnePlusOSS_oneplus_msm8994_5.1.1_gadget_cdromCopy head branch name to clipboard