Currently CONFIG_XIL_AXIS_FIFO=y implicitly depends on
CONFIG_HAS_IOMEM=y; consequently, on architectures without IOMEM we get
the following build error:

ld: drivers/staging/axis-fifo/axis-fifo.o: in function `axis_fifo_probe':
drivers/staging/axis-fifo/axis-fifo.c:809: undefined reference to 
`devm_ioremap_resource'

Fix the build error by adding the unspecified dependency.

Reported-by: Brendan Higgins <brendanhigg...@google.com>
Signed-off-by: Brendan Higgins <brendanhigg...@google.com>
---
 drivers/staging/axis-fifo/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/axis-fifo/Kconfig 
b/drivers/staging/axis-fifo/Kconfig
index 3fffe4d6f327f..f180a8e9f58af 100644
--- a/drivers/staging/axis-fifo/Kconfig
+++ b/drivers/staging/axis-fifo/Kconfig
@@ -4,7 +4,7 @@
 #
 config XIL_AXIS_FIFO
        tristate "Xilinx AXI-Stream FIFO IP core driver"
-       depends on OF
+       depends on OF && HAS_IOMEM
        help
          This adds support for the Xilinx AXI-Stream FIFO IP core driver.
          The AXI Streaming FIFO allows memory mapped access to a AXI Streaming
-- 
2.24.0.525.g8f36a354ae-goog

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