FAILED: patch "[PATCH] iio:adc:stm32-adc: Add HAS_IOMEM dependency" failed to apply to 5.12-stable tree

The patch below does not apply to the 5.12-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to [off-list ref].

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From c03e2df6e1d51f4e1252318275007214a3bd8e85 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <redacted>
Date: Sun, 24 Jan 2021 19:10:22 +0000
Subject: [PATCH] iio:adc:stm32-adc: Add HAS_IOMEM dependency

Seems that there are config combinations in which this driver gets enabled
and hence selects the MFD, but with out HAS_IOMEM getting pulled in
via some other route.  MFD is entirely contained in an
if HAS_IOMEM block, leading to the build issue in this bugzilla.

https://bugzilla.kernel.org/show_bug.cgi?id=209889

Cc: <redacted>
Signed-off-by: Jonathan Cameron <redacted>

diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index bf7d22fa4be2..6605c263949c 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig

@@ -923,6 +923,7 @@ config STM32_ADC_CORE
 	depends on ARCH_STM32 || COMPILE_TEST
 	depends on OF
 	depends on REGULATOR
+	depends on HAS_IOMEM
 	select IIO_BUFFER
 	select MFD_STM32_TIMERS
 	select IIO_STM32_TIMER_TRIGGER