staging: rtl8192e: Avoid multiple line dereference

Avoid multiple line dereference to make the code more readable, as
suggested by checkpatch.pl

This patch fixes the following checkpatch.pl warning:

- WARNING: Avoid multiple line dereference
    prefer 'priv->rtllib->swcamtable[4].key_buf[0]'
  FILE: ./rtl8192e/rtl8192e/rtl_cam.c:189

- WARNING: Avoid multiple line dereference
    prefer 'priv->rtllib->swcamtable[4].key_buf[0]'
  FILE: ./rtl8192e/rtl8192e/rtl_cam.c:195

- WARNING: Avoid multiple line dereference
    prefer 'priv->rtllib->swcamtable[4].key_buf[0]'
  FILE: ./rtl8192e/rtl8192e/rtl_cam.c:204

- WARNING: Avoid multiple line dereference
    prefer 'priv->rtllib->swcamtable[4].key_buf[0]'
  FILE: ./rtl8192e/rtl8192e/rtl_cam.c:209

- WARNING: Avoid multiple line dereference
    prefer 'info_element->data[info_element->len]'
  FILE: ./rtl8192e/rtllib_rx.c:2287

Signed-off-by: Ojaswin Mujoo <ojaswin98@gmail.com>
Link: https://lore.kernel.org/r/435b60bd8874f8105b4af6e7eb9ee5bdbfe3112f.1620642396.git.ojaswin98@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>