staging: rtl8192e: Constify struct pci_device_id

staging: rtl8192e: Constify struct pci_device_id

static variable struct pci_device_id rtl8192_pci_id_tbl is not modified
in file rtl_core.c.

Constifying this structure moves some data to a read-only section, so
increase overall security.

Before
======
   text	   data	    bss	    dec	    hex	filename
  17838	    893	      1	  18732	   492c	drivers/staging/rtl8192e/rtl8192e/rtl_core.o

After
=====
  text	   data	    bss	    dec	    hex	filename
  18006	    725	      1	  18732	   492c	drivers/staging/rtl8192e/rtl8192e/rtl_core.o

Signed-off-by: Riyan Dhiman <riyandhiman14@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/20240831160831.121720-1-riyandhiman14@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>