[S] Change in flashrom[main]: flashchips: add Winbond W25R512NW / W74M51NW

[Nikolai Artemiev (Code Review)]

Attention is currently required from: Alexandru Stan, Anastasia Klimchuk, Stefan Reinauer.

Nikolai Artemiev has posted comments on this change by Alexandru Stan. ( https://review.coreboot.org/c/flashrom/+/84752?usp=email )

Change subject: flashchips: add Winbond W25R512NW / W74M51NW
......................................................................

Patch Set 2: Code-Review+1

(1 comment)

File flashchips.c:

https://review.coreboot.org/c/flashrom/+/84752/comment/54d4f84f_93bb2c56?usp... :
PS2, Line 20269: 		.printlock	= SPI_PRETTYPRINT_STATUS_REGISTER_BP3_SRWD,
               : 		.unlock		= SPI_DISABLE_BLOCKPROTECT,
               :
> Actually, from the datasheet this is fine, leave it. […]

It'd be nice to add full WP support, reusing the values from `W25Q512NW-IM` should work here.

I.e.

```
                .feature_bits   = FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_4BA  | FEATURE_WRSR2
                                  | FEATURE_WRSR3,
                .reg_bits       =
                {
                        .srp    = {STATUS1, 7, RW},
                        .srl    = {STATUS2, 0, RW},
                        .bp     = {{STATUS1, 2, RW}, {STATUS1, 3, RW}, {STATUS1, 4, RW}, {STATUS1, 5, RW}},
                        .tb     = {STATUS1, 6, RW},
                        .cmp    = {STATUS2, 6, RW},
                        .wps    = {STATUS3, 2, RW},
                },
                .decode_range   = DECODE_RANGE_SPI25,
```

Also drop unlock/printlock.

And assuming WP commands like `flashrom --wp-status; flashrom --wp-list; flashrom --wp-enable; flashrom --wp-disable` work properly, also set `TEST_OK_PREWB`.