tty: amba-pl011: prepare REG_* register indexes

Prepare for REG_* register accessors.  This change involves introducing
pl011_reg_to_offset() to convert REG_* to the hardware register offset,
and converting all call sites to use REG_* names.  We need to fix up
locations where we check for equivalence of register offsets as well.

Much of this change was made via these sed expressions:
s/ST_UART01[1x]\(_[^_]*\|_LCRH_[TR]X\)\>/REG_ST\1/
s/UART01[1x]_\(DR\|RSR\|ECR\|FR\|ILPR\|[IF]BRD\|LCRH\|CR\|IFLS\|IMSC\|RIS\|MIS\|ICR\|DMACR\)\>/REG_\1/g
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/amba-pl011.h

+#ifndef AMBA_PL011_H
+#define AMBA_PL011_H
+
+enum {
+	REG_DR = UART01x_DR,
+	REG_ST_DMAWM = ST_UART011_DMAWM,
+	REG_ST_TIMEOUT = ST_UART011_TIMEOUT,
+	REG_FR = UART01x_FR,
+	REG_ST_LCRH_RX = ST_UART011_LCRH_RX,
+	REG_IBRD = UART011_IBRD,
+	REG_FBRD = UART011_FBRD,
+	REG_LCRH = UART011_LCRH,
+	REG_ST_LCRH_TX = ST_UART011_LCRH_TX,
+	REG_CR = UART011_CR,
+	REG_IFLS = UART011_IFLS,
+	REG_IMSC = UART011_IMSC,
+	REG_RIS = UART011_RIS,
+	REG_MIS = UART011_MIS,
+	REG_ICR = UART011_ICR,
+	REG_DMACR = UART011_DMACR,
+	REG_ST_XFCR = ST_UART011_XFCR,
+	REG_ST_XON1 = ST_UART011_XON1,
+	REG_ST_XON2 = ST_UART011_XON2,
+	REG_ST_XOFF1 = ST_UART011_XOFF1,
+	REG_ST_XOFF2 = ST_UART011_XOFF2,
+	REG_ST_ITCR = ST_UART011_ITCR,
+	REG_ST_ITIP = ST_UART011_ITIP,
+	REG_ST_ABCR = ST_UART011_ABCR,
+	REG_ST_ABIMSC = ST_UART011_ABIMSC,
+};
+
+#endif