dell/e6*30: use generic PS2K/PS2M EISAID strings
    
    CONFIG_PS2M_EISAID. this is a a string used for the
    identifier on the mouse, in ACPI.
    
    CONFIG_PS2K_EISAID this is used for the keyboard.
    
    IASL comes back with this build error:
    
    dsdt.asl   1884:   Name(_HID, EISAID("DLLK0534"))
    Error    6045 -                              ^ EISAID string must be of the form "UUUXXXX" (3 uppercase, 4 hex digits) (DLLK0534)
    
    Change DLLK0534 back to PNP0303 and
    change DLL0534 back to PNP0F13. These are generic identifiers
    for PS/2 keyboard and mouse. Any generic driver will work with
    the onboard mouse/keyboard on these machines. They do not need
    to be changed. These are the default values anyway. Just leave
    them explicitly defined to the default values, for now; if these
    options are not set, coreboot will default to these values.
    
    This shouldn't break anything for the users. I've reported this
    to Nicholas Chin, author of those patches. Libreboot imported
    the new versions of E6430/E6530 board patches in the coreboot
    revision update, but the new (technically correct) values broke
    IASL, so I've decided to use the old values for now.
    
    Signed-off-by: Leah Rowe <leah@libreboot.org>