sysreset: Remove DM_FLAG_PRE_RELOC flag in various drivers

When a driver declares DM_FLAG_PRE_RELOC flag, it wishes to be
bound before relocation. However due to a bug in the DM core,
the flag only takes effect when devices are statically declared
via U_BOOT_DEVICE(). This bug has been fixed recently by commit
"dm: core: Respect drivers with the DM_FLAG_PRE_RELOC flag in
lists_bind_fdt()", but with the fix, it has a side effect that
all existing drivers that declared DM_FLAG_PRE_RELOC flag will
be bound before relocation now. This may expose potential boot
failure on some boards due to insufficient memory during the
pre-relocation stage.

To mitigate this potential impact, the following changes are
implemented:

- Remove DM_FLAG_PRE_RELOC flag in the driver, if the driver
  only supports configuration from device tree (OF_CONTROL)
- Keep DM_FLAG_PRE_RELOC flag in the driver only if the device
  is statically declared via U_BOOT_DEVICE()
- Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for
  drivers that support both statically declared devices and
  configuration from device tree

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/x86/cpu/tangier/sysreset.c

@@ -44,5 +44,4 @@ U_BOOT_DRIVER(tangier_sysreset) = {
 	.id = UCLASS_SYSRESET,
 	.of_match = tangier_sysreset_ids,
 	.ops = &tangier_sysreset_ops,
-	.flags = DM_FLAG_PRE_RELOC,
 };

drivers/sysreset/sysreset_x86.c

@@ -45,5 +45,4 @@ U_BOOT_DRIVER(x86_sysreset) = {
 	.id = UCLASS_SYSRESET,
 	.of_match = x86_sysreset_ids,
 	.ops = &x86_sysreset_ops,
-	.flags = DM_FLAG_PRE_RELOC,
 };

lib/efi/efi_app.c

@@ -161,5 +161,4 @@ U_BOOT_DRIVER(efi_sysreset) = {
 	.id = UCLASS_SYSRESET,
 	.of_match = efi_sysreset_ids,
 	.ops = &efi_sysreset_ops,
-	.flags = DM_FLAG_PRE_RELOC,
 };