sfp: buffer overflow in csp_sfp_send_own_memcpy

[dimitrovand]

Passing MTU > (CSP_BUFFER_SIZE - sizeof(sfp_header_t)) can lead to a buffer overflow when data is copied into packet->data. The only way to prevent such a scenario is to use your own memcpy function which checks if the size to be copied is valid. The issue is caused by csp_buffer_get(...) no longer checking its input parameters.

[dimitrovand]

Just saw PR #503