riscv: k210: Rename airam to aisram

This is more consistent with the naming of other ram banks, and matches
what Linux is doing.

Reported-by: Damien Le Moal <Damien.LeMoal@wdc.com>
Signed-off-by: Sean Anderson <seanga2@gmail.com>
diff --git a/board/sipeed/maix/maix.c b/board/sipeed/maix/maix.c
index 6e58291..52e4fee 100644
--- a/board/sipeed/maix/maix.c
+++ b/board/sipeed/maix/maix.c
@@ -17,7 +17,7 @@
 static int sram_init(void)
 {
 	int ret, i;
-	const char * const banks[] = { "sram0", "sram1", "airam" };
+	const char * const banks[] = { "sram0", "sram1", "aisram" };
 	ofnode memory;
 	struct clk clk;