spi: ath79: remove spi-master setup and cleanup assignment

This removes the assignment of setup and cleanup functions for the ath79
target. Assigning the setup-method will lead to 'setup_transfer' not
being assigned in spi_bitbang_init.

Also drop the redundant cleanup assignment, as this also happens in
spi_bitbang_init.

Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/ath79/patches-5.4/0050-spi-ath79-remove-spi-master-setup-and-cleanup-assign.patch

@@ -0,0 +1,28 @@
+From b142b1beb199f62d47370c98a3dd8e13f792e9c0 Mon Sep 17 00:00:00 2001
+From: David Bauer <mail@david-bauer.net>
+Date: Thu, 27 Feb 2020 23:03:20 +0100
+Subject: [PATCH] spi: ath79: remove spi-master setup and cleanup assignment
+
+This removes the assignment of setup and cleanup functions for the ath79
+target. Assigning the setup-method will lead to 'setup_transfer' not
+being assigned in spi_bitbang_init.
+
+Also drop the redundant cleanup assignment, as this also happens in
+spi_bitbang_init.
+
+Signed-off-by: David Bauer <mail@david-bauer.net>
+---
+ drivers/spi/spi-ath79.c | 2 --
+ 1 file changed, 2 deletions(-)
+
+--- a/drivers/spi/spi-ath79.c
++++ b/drivers/spi/spi-ath79.c
+@@ -152,8 +152,6 @@ static int ath79_spi_probe(struct platfo
+ 
+ 	master->use_gpio_descriptors = true;
+ 	master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32);
+-	master->setup = spi_bitbang_setup;
+-	master->cleanup = spi_bitbang_cleanup;
+ 
+ 	sp->bitbang.master = master;
+ 	sp->bitbang.chipselect = ath79_spi_chipselect;