nb/intel/gm45: Use PCI bitwise ops

While we are at it, also reflow a few lines that fit in 96 characters.

Tested with BUILD_TIMELESS=1, Roda RK9 does not change.

Change-Id: Icaca44280acdba099a5e13c5fd91d82c3e002bae
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42189
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Michael Niewöhner
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/intel/gm45/raminit.c b/src/northbridge/intel/gm45/raminit.c
index 86c7ace..b95e563 100644
--- a/src/northbridge/intel/gm45/raminit.c
+++ b/src/northbridge/intel/gm45/raminit.c
@@ -808,8 +808,7 @@
 	pci_write_config16(GCFGC_PCIDEV, GCFGC_OFFSET, gcfgc);
 
 	/* Clear update bit. */
-	pci_write_config16(GCFGC_PCIDEV, GCFGC_OFFSET,
-		pci_read_config16(GCFGC_PCIDEV, GCFGC_OFFSET) & ~GCFGC_UPDATE);
+	pci_and_config16(GCFGC_PCIDEV, GCFGC_OFFSET, ~GCFGC_UPDATE);
 
 	/* Set display clock select bit. */
 	pci_write_config16(GCFGC_PCIDEV, GCFGC_OFFSET,
@@ -1229,10 +1228,7 @@
 		}
 		/* TSEG 2M, This amount can easily be covered by SMRR MTRR's,
 		   which requires to have TSEG_BASE aligned to TSEG_SIZE. */
-		u8 reg8 = pci_read_config8(PCI_DEV(0, 0, 0), D0F0_ESMRAMC);
-		reg8 &= ~0x7;
-		reg8 |= (1 << 1) | (1 << 0); /* 2M and TSEG_Enable */
-		pci_write_config8(PCI_DEV(0, 0, 0), D0F0_ESMRAMC, reg8);
+		pci_update_config8(PCI_DEV(0, 0, 0), D0F0_ESMRAMC, ~0x07, (1 << 1) | (1 << 0));
 		uma_sizem += 2;
 	}
 
@@ -1560,10 +1556,9 @@
 
 	MCHBAR32(DCC_MCHBAR) = (MCHBAR32(DCC_MCHBAR) & ~DCC_CMD_MASK) | DCC_CMD_NOP;
 
-	u8 reg8 = pci_read_config8(PCI_DEV(0, 0, 0), 0xf0);
-	pci_write_config8(PCI_DEV(0, 0, 0), 0xf0, reg8 & ~(1 << 2));
-	reg8 = pci_read_config8(PCI_DEV(0, 0, 0), 0xf0);
-	pci_write_config8(PCI_DEV(0, 0, 0), 0xf0, reg8 |  (1 << 2));
+	pci_and_config8(PCI_DEV(0, 0, 0), 0xf0, ~(1 << 2));
+
+	pci_or_config8(PCI_DEV(0, 0, 0), 0xf0, 1 << 2);
 	udelay(2);
 
 				  /* 5  6  7  8  9 10 11 12 */
@@ -1701,7 +1696,6 @@
 	const timings_t *const timings = &sysinfo->selected_timings;
 
 	int ch;
-	u8 reg8;
 
 	timestamp_add_now(TS_BEFORE_INITRAM);
 
@@ -1773,10 +1767,10 @@
 
 	/* Announce normal operation, initialization completed. */
 	MCHBAR32(DCC_MCHBAR) |= (0x7 << 16) | (0x1 << 19);
-	reg8 = pci_read_config8(PCI_DEV(0, 0, 0), 0xf0);
-	pci_write_config8(PCI_DEV(0, 0, 0), 0xf0, reg8 | (1 << 2));
-	reg8 = pci_read_config8(PCI_DEV(0, 0, 0), 0xf0);
-	pci_write_config8(PCI_DEV(0, 0, 0), 0xf0, reg8 & ~(1 << 2));
+
+	pci_or_config8(PCI_DEV(0, 0, 0), 0xf0, 1 << 2);
+
+	pci_and_config8(PCI_DEV(0, 0, 0), 0xf0, ~(1 << 2));
 
 
 	/* Take a breath (the reader). */
@@ -1811,8 +1805,7 @@
 	dram_optimizations(timings, dimms);
 
 	/* Mark raminit being finished. :-) */
-	u8 tmp8 = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xa2) & ~(1 << 7);
-	pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xa2, tmp8);
+	pci_and_config8(PCI_DEV(0, 0x1f, 0), 0xa2, (u8)~(1 << 7));
 
 	raminit_thermal(sysinfo);
 	init_igd(sysinfo);