powerpc: wii: Remove outdated comment about memory fixups

The workaround has been removed. What stays is just code to find the
memory hole so the BATs can be configured properly in the function below.

Fixes: 57deb8fe ("powerpc/wii: Don't rely on the reserved memory hack")
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/embedded6xx/wii.c

@@ -67,16 +67,6 @@ void __init wii_memory_fixups(void)
 {
 	struct memblock_region *p = memblock.memory.regions;
 
-	/*
-	 * This is part of a workaround to allow the use of two
-	 * discontinuous RAM ranges on the Wii, even if this is
-	 * currently unsupported on 32-bit PowerPC Linux.
-	 *
-	 * We coalesce the two memory ranges of the Wii into a
-	 * single range, then create a reservation for the "hole"
-	 * between both ranges.
-	 */
-
 	BUG_ON(memblock.memory.cnt != 2);
 	BUG_ON(!page_aligned(p[0].base) || !page_aligned(p[1].base));