internal.c: laptop_ok global state can become stale

Craask and similar DUT's are erroneously probing random second chips.

```
Found chipset "Intel Alder Lake-N".
Enabling flash write... SPI Configuration is locked down.
FREG0: Flash Descriptor region (0x00000000-0x00000fff) is read-write.
FREG1: BIOS region (0x003a0000-0x00ffffff) is read-write.
FREG2: Management Engine region (0x00001000-0x0039ffff) is read-write.
OK.
Found Winbond flash chip "W25Q128.V..M" (16384 kB, Programmer-specific) on host.
Warning: Setting BIOS Control at 0xdc from 0x8b to 0x89 failed.
New value is 0x8b.
Found MoselVitelic flash chip "V29C51000T" (64 kB, Parallel) mapped at physical address 0x00000000ffff0000.
```

This seems to be due to `laptop_ok` becoming a stale global state
after the first operation leading to probing on unrelated buses.

Therefore unconditionally reset the global state upon entry into
the internal driver.

BUG=b:260518132,b:260151917
TEST=Craask reportly no longer finds duplicate chip.

Change-Id: I2c00c351904307eeb1488c5dfaffc91d6468ee25
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/70026
Reviewed-by: Sam McNally <sammc@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
---
M internal.c
1 file changed, 41 insertions(+), 0 deletions(-)

diff --git a/internal.c b/internal.c
index 4f68456..9b80f37 100644
--- a/internal.c
+++ b/internal.c
@@ -211,6 +211,9 @@
 	if (ret)
 		return ret;
 
+	/* Unconditionally reset global state from previous operation. */
+	laptop_ok = false;
+
 	/* Default to Parallel/LPC/FWH flash devices. If a known host controller
 	 * is found, the host controller init routine sets the
 	 * internal_buses_supported bitfield.

