treewide: Move stdlib.h to commonlib

This patch moves commonlib/stdlib.h -> commonlib/bsd/stdlib.h, since
all code is BSD licensed anyway.
It also moves some code from libpayloads stdlib.h to
commonlib/bsd/stdlib.h so that it can be shared with coreboot. This is
useful for a subsequent commit that adds devicetree.c into commonlib.

Also we don't support DMA on arm platforms in coreboot (only libpayload)
therefore `dma_malloc()` has been removed and `dma_coherent()` has been
moved to architecture specific functions. Any architecture that tries to
use `dma_coherent()` now will get a compile time error. In order to not
break current platforms like mb/google/herobrine which make use of the
commonlib/storage/sdhci.c controller which in turn uses `dma_coherent` a
stub has been added to arch/arm64/dma.c.

Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Change-Id: I3a7ab0d1ddcc7ce9af121a61b4d4eafc9e563a8a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77969
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/arch/arm64/Makefile.mk

@@ -119,6 +119,7 @@ ramstage-$(CONFIG_ARM64_USE_ARM_TRUSTED_FIRMWARE) += bl31.c
 ramstage-y += transition.c transition_asm.S
 ramstage-$(CONFIG_PAYLOAD_FIT_SUPPORT) += fit_payload.c
 ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi.c
+ramstage-y += dma.c
 
 rmodules_arm64-y += memset.S
 rmodules_arm64-y += memcpy.S

src/arch/arm64/dma.c

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <stdlib.h>
+
+int dma_coherent(const void *ptr)
+{
+	return 0;
+}

src/arch/ppc64/include/arch/hlt.h

@@ -1,7 +1,12 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#ifndef ARCH_HLT_H
+#define ARCH_HLT_H
+
 static __always_inline void hlt(void)
 {
 	while (1)
 		;
 }
+
+#endif /* ARCH_HLT_H */

src/arch/riscv/include/arch/hlt.h

@@ -1,6 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#ifndef ARCH_HLT_H
+#define ARCH_HLT_H
+
 static __always_inline void hlt(void)
 {
 	while (1);
 }
+
+#endif /* ARCH_HLT_H */

src/arch/x86/Makefile.mk

@@ -261,6 +261,7 @@ ramstage-y += ebda.c
 ramstage-y += exception.c
 ramstage-y += idt.S
 ramstage-$(CONFIG_IOAPIC) += ioapic.c
+ramstage-y += dma.c
 ramstage-y += memcpy.c
 ramstage-$(CONFIG_ARCH_RAMSTAGE_X86_32) += memmove_32.c
 ramstage-$(CONFIG_ARCH_RAMSTAGE_X86_64) += memmove_64.S

src/arch/x86/dma.c

@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <stdlib.h>
+
+int dma_coherent(const void *ptr)
+{
+	return 1;
+}