ACPI: Fix ARM32 platforms compile issue introduced by fw_table changes

Linus reported that:
After commit a103f46633 the kernel stopped compiling for
several ARM32 platforms that I am building with a bare metal
compiler. Bare metal compilers (arm-none-eabi-) don't
define __linux__.

This is because the header <acpi/platform/acenv.h> is now
in the include path for <linux/irq.h>:

  CC      arch/arm/kernel/irq.o
  CC      kernel/sysctl.o
  CC      crypto/api.o
In file included from ../include/acpi/acpi.h:22,
                 from ../include/linux/fw_table.h:29,
                 from ../include/linux/acpi.h:18,
                 from ../include/linux/irqchip.h:14,
                 from ../arch/arm/kernel/irq.c:25:
../include/acpi/platform/acenv.h:218:2: error: #error Unknown target environment
  218 | #error Unknown target environment
      |  ^~~~~

The issue is caused by the introducing of splitting out the ACPI code to
support the new generic fw_table code.

Rafael suggested [1] moving the fw_table.h include in linux/acpi.h to below
the linux/mutex.h. Remove the two includes in fw_table.h. Replace
linux/fw_table.h include in fw_table.c with linux/acpi.h.

Link: https://lore.kernel.org/linux-acpi/CAJZ5v0idWdJq3JSqQWLG5q+b+b=zkEdWR55rGYEoxh7R6N8kFQ@mail.gmail.com/
Fixes: a103f46633 ("acpi: Move common tables helper functions to common lib")
Closes: https://lore.kernel.org/linux-acpi/20231114-arm-build-bug-v1-1-458745fe32a4@linaro.org/
Reported-by: Linus Walleij <linus.walleij@linaro.org>
Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

include/linux/fw_table.h

@@ -25,9 +25,6 @@ struct acpi_subtable_proc {
 	int count;
 };
 
-#include <linux/acpi.h>
-#include <acpi/acpi.h>
-
 union acpi_subtable_headers {
 	struct acpi_subtable_header common;
 	struct acpi_hmat_structure hmat;