src/soc/nvidia: Remove unused <stdlib.h>

Change-Id: I404d149cd1052fa0aef233bd0e0867524c738477
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37382
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/nvidia/tegra124/dma.c

@@ -21,7 +21,6 @@
 #include <soc/addressmap.h>
 #include <soc/dma.h>
 #include <stddef.h>
-#include <stdlib.h>
 
 struct apb_dma * const apb_dma = (struct apb_dma *)TEGRA_APB_DMA_BASE;