mtd: spi-nor: core: Restrict blind MRAM reset to mram nodes

The spi_nor_everspin_reboot_fix() was executing unconditionally for any
SPI NOR device lacking a dedicated reset GPIO. This caused unintended
8-8-8 soft reset sequences and an unnecessary boot delay for unrelated
flashes.

While the new WOSM p0004263 hardware revision routes the MRAM nRST to
a GPIO, older revisions (e.g. p0000042) still rely on nPORz and therefore
need this fallback to escape Octal-STR mode during a warm reboot.

Limit the blind reset strictly to nodes named "mram" to avoid breaking
standard SPI NOR flash initializations.

Signed-off-by: Heinrich Toews <ht@twx-software.de>

drivers/mtd/spi-nor/core.c

@@ -3466,6 +3466,13 @@ static void spi_nor_everspin_reboot_fix(struct spi_nor *nor)
 	if (!nor->spimem || !nor->dev)
 		return;
 
+	/*
+	 * Limit this hack to nodes explicitly named "mram" to prevent
+	 * sending blind 8-8-8 resets to unrelated SPI NOR flashes.
+	 */
+	if (!nor->dev->of_node || !of_node_name_eq(nor->dev->of_node, "mram"))
+		return;
+
 	/*
 	 * Logging as dev_info so it appears in dmesg during boot.
 	 * This helps verify if the fix is being executed.