boot/efi/dtb: require exact match for PL011 in device tree

Don't match PL011 for arm,primecell compatibility string
as it can indicate other peripherals.

Primecell peripherals have the generic "arm,primcecell"
name as well as a specific name in the format of "arm,pl???"

see:
https://www.kernel.org/doc/Documentation/devicetree/bindings/arm/primecell.txt

Change-Id: Ida6450e9e71dac834770d558e4ab95c5574970cb
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4733
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

src/system/boot/platform/efi/dtb.cpp

@@ -69,7 +69,6 @@ const struct supported_uarts {
 	{ "sifive,uart0", UART_KIND_SIFIVE, &get_uart<ArchUARTSifive> },
 #elif defined(__ARM__) || defined(__aarch64__)
 	{ "arm,pl011", UART_KIND_PL011, &get_uart<ArchUARTPL011> },
-	{ "arm,primecell", UART_KIND_PL011, &get_uart<ArchUARTPL011> },
 #endif
 };