Documentation: arm64/arm-acpi: drop duplicate words

Drop the doubled word "the".
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: linux-acpi@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20200703205110.29873-2-rdunlap@infradead.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/arm64/arm-acpi.rst

@@ -470,7 +470,7 @@ likely be willing to assist in submitting ECRs.
 
 Linux Code
 ----------
-Individual items specific to Linux on ARM, contained in the the Linux
+Individual items specific to Linux on ARM, contained in the Linux
 source code, are in the list that follows:
 
 ACPI_OS_NAME