add itf argument to hid API to support multiple instances#678
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following API signature is changed: - tud_hid_descriptor_report_cb() - tud_hid_get_report_cb() - tud_hid_set_report_cb() - tud_hid_boot_mode_cb() - tud_hid_set_idle_cb()
This was referenced Feb 24, 2021
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Describe the PR
Follow up to #524, this PR remove backward-compatible single ITF callback when
CFG_TUD_HID=1. This makes it clearer for user to notice that stack support multiple instance of HID interfaces and simplify the #ifelse in application should it choose to enable multiple HID. Following API signature is changed and required updated in application.